diff --git a/package.json b/package.json
index dcb62c8..365fc22 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "@types/jest": "20.0.8",
     "@types/node": "8.0.27",
     "@types/request": "2.0.3",
-    "jest": "21.0.1",
+    "jest": "21.0.2",
     "jest-playback": "1.0.1",
     "prettier": "1.6.1",
     "prettier-config-ikatyang": "1.1.1",
diff --git a/yarn.lock b/yarn.lock
index 6c3cd71..d892386 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -68,9 +68,9 @@ amdefine@>=0.0.4:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/amdefine/-/amdefine-1.0.1.tgz#4a5282ac164729e93619bcfd3ad151f817ce91f5"
 
-ansi-escapes@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-2.0.0.tgz#5bae52be424878dd9783e8910e3fc2922e83c81b"
+ansi-escapes@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/ansi-escapes/-/ansi-escapes-3.0.0.tgz#ec3e8b4e9f8064fc02c3ac9b65f1c275bda8ef92"
 
 ansi-regex@^2.0.0:
   version "2.1.1"
@@ -158,6 +158,10 @@ assertion-error@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/assertion-error/-/assertion-error-1.0.2.tgz#13ca515d86206da0bac66e834dd397d87581094c"
 
+astral-regex@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/astral-regex/-/astral-regex-1.0.0.tgz#6c8c3fb827dd43ee3918f27b82782ab7658a6fd9"
+
 async@^1.4.0:
   version "1.5.2"
   resolved "https://registry.yarnpkg.com/async/-/async-1.5.2.tgz#ec6a61ae56480c0c3cb241c95618e20892f9672a"
@@ -232,12 +236,12 @@ babel-helpers@^6.24.1:
     babel-runtime "^6.22.0"
     babel-template "^6.24.1"
 
-babel-jest@^21.0.0:
-  version "21.0.0"
-  resolved "https://registry.yarnpkg.com/babel-jest/-/babel-jest-21.0.0.tgz#4f636a7dce105aa5753d5f3dde4422ff50c1d6c5"
+babel-jest@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/babel-jest/-/babel-jest-21.0.2.tgz#817ea52c23f1c6c4b684d6960968416b6a9e9c6c"
   dependencies:
     babel-plugin-istanbul "^4.0.0"
-    babel-preset-jest "^21.0.0"
+    babel-preset-jest "^21.0.2"
 
 babel-messages@^6.23.0:
   version "6.23.0"
@@ -257,6 +261,10 @@ babel-plugin-jest-hoist@^21.0.0:
   version "21.0.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-jest-hoist/-/babel-plugin-jest-hoist-21.0.0.tgz#aa2dbab7b0d58fa635640efd53aab730be7b3273"
 
+babel-plugin-jest-hoist@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/babel-plugin-jest-hoist/-/babel-plugin-jest-hoist-21.0.2.tgz#cfdce5bca40d772a056cb8528ad159c7bb4bb03d"
+
 babel-plugin-transform-es2015-modules-commonjs@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-es2015-modules-commonjs/-/babel-plugin-transform-es2015-modules-commonjs-6.24.1.tgz#d3e310b40ef664a36622200097c6d440298f2bfe"
@@ -279,6 +287,12 @@ babel-preset-jest@^21.0.0:
   dependencies:
     babel-plugin-jest-hoist "^21.0.0"
 
+babel-preset-jest@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/babel-preset-jest/-/babel-preset-jest-21.0.2.tgz#9db25def2329f49eace3f5ea0de42a0b898d12cc"
+  dependencies:
+    babel-plugin-jest-hoist "^21.0.2"
+
 babel-register@^6.24.1:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-register/-/babel-register-6.24.1.tgz#7e10e13a2f71065bdfad5a1787ba45bca6ded75f"
@@ -400,10 +414,6 @@ camelcase@^1.0.2:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-1.2.1.tgz#9bb5304d2e0b56698b2c758b08a3eaa9daa58a39"
 
-camelcase@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-3.0.0.tgz#32fc4b9fcdaf845fcdf7e73bb97cac2261f0ab0a"
-
 camelcase@^4.1.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-4.1.0.tgz#d545635be1e33c542649c69173e5de6acfae34dd"
@@ -776,6 +786,17 @@ expect@^21.0.0:
     jest-message-util "^21.0.0"
     jest-regex-util "^21.0.0"
 
+expect@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/expect/-/expect-21.0.2.tgz#b34abf0635ec9d6aea1ce7edb4722afe86c4a38f"
+  dependencies:
+    ansi-styles "^3.2.0"
+    jest-diff "^21.0.2"
+    jest-get-type "^21.0.2"
+    jest-matcher-utils "^21.0.2"
+    jest-message-util "^21.0.2"
+    jest-regex-util "^21.0.2"
+
 extend@~3.0.0:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/extend/-/extend-3.0.1.tgz#a755ea7bc1adfcc5a31ce7e762dbaadc5e636444"
@@ -1260,17 +1281,17 @@ istanbul-reports@^1.1.1:
   dependencies:
     handlebars "^4.0.3"
 
-jest-changed-files@^21.0.0:
-  version "21.0.0"
-  resolved "https://registry.yarnpkg.com/jest-changed-files/-/jest-changed-files-21.0.0.tgz#fa7cfc353187e2fb852dd5830e8d09068dde78d1"
+jest-changed-files@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-changed-files/-/jest-changed-files-21.0.2.tgz#0a74f35cf2d3b7c8ef9ab4fac0a75409f81ec1b0"
   dependencies:
     throat "^4.0.0"
 
-jest-cli@^21.0.1:
-  version "21.0.1"
-  resolved "https://registry.yarnpkg.com/jest-cli/-/jest-cli-21.0.1.tgz#b3e9ef6d0ae0e43870932d2ed3d10de0515e9d34"
+jest-cli@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-cli/-/jest-cli-21.0.2.tgz#2e08af63d44fc21284ebf496cf71e381f3cc9786"
   dependencies:
-    ansi-escapes "^2.0.0"
+    ansi-escapes "^3.0.0"
     chalk "^2.0.1"
     glob "^7.1.2"
     graceful-fs "^4.1.11"
@@ -1279,26 +1300,26 @@ jest-cli@^21.0.1:
     istanbul-lib-coverage "^1.0.1"
     istanbul-lib-instrument "^1.4.2"
     istanbul-lib-source-maps "^1.1.0"
-    jest-changed-files "^21.0.0"
-    jest-config "^21.0.0"
-    jest-environment-jsdom "^21.0.0"
-    jest-haste-map "^21.0.0"
-    jest-message-util "^21.0.0"
-    jest-regex-util "^21.0.0"
-    jest-resolve-dependencies "^21.0.0"
-    jest-runner "^21.0.0"
-    jest-runtime "^21.0.0"
-    jest-snapshot "^21.0.0"
-    jest-util "^21.0.0"
+    jest-changed-files "^21.0.2"
+    jest-config "^21.0.2"
+    jest-environment-jsdom "^21.0.2"
+    jest-haste-map "^21.0.2"
+    jest-message-util "^21.0.2"
+    jest-regex-util "^21.0.2"
+    jest-resolve-dependencies "^21.0.2"
+    jest-runner "^21.0.2"
+    jest-runtime "^21.0.2"
+    jest-snapshot "^21.0.2"
+    jest-util "^21.0.2"
     micromatch "^2.3.11"
     node-notifier "^5.0.2"
-    pify "^2.3.0"
+    pify "^3.0.0"
     slash "^1.0.0"
-    string-length "^1.0.1"
+    string-length "^2.0.0"
     strip-ansi "^4.0.0"
     which "^1.2.12"
     worker-farm "^1.3.1"
-    yargs "^7.0.2"
+    yargs "^9.0.0"
 
 jest-config@^21.0.0:
   version "21.0.0"
@@ -1316,6 +1337,22 @@ jest-config@^21.0.0:
     jest-validate "^21.0.0"
     pretty-format "^21.0.0"
 
+jest-config@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-config/-/jest-config-21.0.2.tgz#ea42b94f3c22ae4e4aa11c69f5b45e34e342199d"
+  dependencies:
+    chalk "^2.0.1"
+    glob "^7.1.1"
+    jest-environment-jsdom "^21.0.2"
+    jest-environment-node "^21.0.2"
+    jest-get-type "^21.0.2"
+    jest-jasmine2 "^21.0.2"
+    jest-regex-util "^21.0.2"
+    jest-resolve "^21.0.2"
+    jest-util "^21.0.2"
+    jest-validate "^21.0.2"
+    pretty-format "^21.0.2"
+
 jest-diff@^21.0.0:
   version "21.0.0"
   resolved "https://registry.yarnpkg.com/jest-diff/-/jest-diff-21.0.0.tgz#b996ba2963a783125e6bc59fd5623bce67df7f17"
@@ -1325,13 +1362,22 @@ jest-diff@^21.0.0:
     jest-get-type "^21.0.0"
     pretty-format "^21.0.0"
 
+jest-diff@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-diff/-/jest-diff-21.0.2.tgz#751014f36ad5d505f6affce5542fde0e444ee50a"
+  dependencies:
+    chalk "^2.0.1"
+    diff "^3.2.0"
+    jest-get-type "^21.0.2"
+    pretty-format "^21.0.2"
+
 jest-docblock@^20.0.1:
   version "20.0.3"
   resolved "https://registry.yarnpkg.com/jest-docblock/-/jest-docblock-20.0.3.tgz#17bea984342cc33d83c50fbe1545ea0efaa44712"
 
-jest-docblock@^21.0.0:
-  version "21.0.0"
-  resolved "https://registry.yarnpkg.com/jest-docblock/-/jest-docblock-21.0.0.tgz#7dd57568543aec98910f749540afc15fab53a27f"
+jest-docblock@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-docblock/-/jest-docblock-21.0.2.tgz#66f69ddb440799fc32f91d0ac3d8d35e99e2032f"
 
 jest-environment-jsdom@^21.0.0:
   version "21.0.0"
@@ -1341,6 +1387,14 @@ jest-environment-jsdom@^21.0.0:
     jest-util "^21.0.0"
     jsdom "^9.12.0"
 
+jest-environment-jsdom@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-environment-jsdom/-/jest-environment-jsdom-21.0.2.tgz#6f6ab5bd71970d1900fbd47a46701c0a07fa3be5"
+  dependencies:
+    jest-mock "^21.0.2"
+    jest-util "^21.0.2"
+    jsdom "^9.12.0"
+
 jest-environment-node@^21.0.0:
   version "21.0.0"
   resolved "https://registry.yarnpkg.com/jest-environment-node/-/jest-environment-node-21.0.0.tgz#ffc781b82569f3f4bc2d8fb8f1ea7373cb11f043"
@@ -1348,17 +1402,28 @@ jest-environment-node@^21.0.0:
     jest-mock "^21.0.0"
     jest-util "^21.0.0"
 
+jest-environment-node@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-environment-node/-/jest-environment-node-21.0.2.tgz#4267ceb39551f8ecaed182ab882a93ef4d5de240"
+  dependencies:
+    jest-mock "^21.0.2"
+    jest-util "^21.0.2"
+
 jest-get-type@^21.0.0:
   version "21.0.0"
   resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-21.0.0.tgz#ed8667533c0a24a4feebbf492661f23abac3620b"
 
-jest-haste-map@^21.0.0:
-  version "21.0.0"
-  resolved "https://registry.yarnpkg.com/jest-haste-map/-/jest-haste-map-21.0.0.tgz#1f099ff6aedb52ec55fa9773ce26e4bbb00b0580"
+jest-get-type@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-get-type/-/jest-get-type-21.0.2.tgz#304e6b816dd33cd1f47aba0597bcad258a509fc6"
+
+jest-haste-map@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-haste-map/-/jest-haste-map-21.0.2.tgz#bd98bc6cd6f207eb029b2f5918da1a9347eb11b7"
   dependencies:
     fb-watchman "^2.0.0"
     graceful-fs "^4.1.11"
-    jest-docblock "^21.0.0"
+    jest-docblock "^21.0.2"
     micromatch "^2.3.11"
     sane "^2.0.0"
     worker-farm "^1.3.1"
@@ -1376,6 +1441,19 @@ jest-jasmine2@^21.0.0:
     jest-snapshot "^21.0.0"
     p-cancelable "^0.3.0"
 
+jest-jasmine2@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-jasmine2/-/jest-jasmine2-21.0.2.tgz#a368abb3a686def4d6e763509a265104943cd469"
+  dependencies:
+    chalk "^2.0.1"
+    expect "^21.0.2"
+    graceful-fs "^4.1.11"
+    jest-diff "^21.0.2"
+    jest-matcher-utils "^21.0.2"
+    jest-message-util "^21.0.2"
+    jest-snapshot "^21.0.2"
+    p-cancelable "^0.3.0"
+
 jest-matcher-utils@^21.0.0:
   version "21.0.0"
   resolved "https://registry.yarnpkg.com/jest-matcher-utils/-/jest-matcher-utils-21.0.0.tgz#493dc25b9ed6a23a61802ca20656f0f1c16f15b1"
@@ -1384,6 +1462,14 @@ jest-matcher-utils@^21.0.0:
     jest-get-type "^21.0.0"
     pretty-format "^21.0.0"
 
+jest-matcher-utils@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-matcher-utils/-/jest-matcher-utils-21.0.2.tgz#eb6736a45b698546d71f7e1ffbbd36587eeb27bc"
+  dependencies:
+    chalk "^2.0.1"
+    jest-get-type "^21.0.2"
+    pretty-format "^21.0.2"
+
 jest-message-util@^21.0.0:
   version "21.0.0"
   resolved "https://registry.yarnpkg.com/jest-message-util/-/jest-message-util-21.0.0.tgz#cd49c2e91d7a227e622884c418185a1a7cbe1fd6"
@@ -1392,10 +1478,22 @@ jest-message-util@^21.0.0:
     micromatch "^2.3.11"
     slash "^1.0.0"
 
+jest-message-util@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-message-util/-/jest-message-util-21.0.2.tgz#81242e07d426ad54c15f3d7c55b072e9db7b39a9"
+  dependencies:
+    chalk "^2.0.1"
+    micromatch "^2.3.11"
+    slash "^1.0.0"
+
 jest-mock@^21.0.0:
   version "21.0.0"
   resolved "https://registry.yarnpkg.com/jest-mock/-/jest-mock-21.0.0.tgz#948fdbb44ef702ca998e078ca62b4968780e102e"
 
+jest-mock@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-mock/-/jest-mock-21.0.2.tgz#5e92902450e1ce78be3864cc4d50dbd5d1582fbd"
+
 jest-playback@1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/jest-playback/-/jest-playback-1.0.1.tgz#7d66056b4647d5248092e2cb582eefb70381b057"
@@ -1410,11 +1508,15 @@ jest-regex-util@^21.0.0:
   version "21.0.0"
   resolved "https://registry.yarnpkg.com/jest-regex-util/-/jest-regex-util-21.0.0.tgz#f13c382a1c55515c20471390ab38e5d71cbd320e"
 
-jest-resolve-dependencies@^21.0.0:
-  version "21.0.0"
-  resolved "https://registry.yarnpkg.com/jest-resolve-dependencies/-/jest-resolve-dependencies-21.0.0.tgz#09dfd9654a8af92880a2f66076871d48810bd48d"
+jest-regex-util@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-regex-util/-/jest-regex-util-21.0.2.tgz#06248c07b53ff444223ebe8e33a25bc051ac976f"
+
+jest-resolve-dependencies@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-resolve-dependencies/-/jest-resolve-dependencies-21.0.2.tgz#c42cc371034023ac1a226a7a52f86233c8871938"
   dependencies:
-    jest-regex-util "^21.0.0"
+    jest-regex-util "^21.0.2"
 
 jest-resolve@^21.0.0:
   version "21.0.0"
@@ -1424,42 +1526,50 @@ jest-resolve@^21.0.0:
     chalk "^2.0.1"
     is-builtin-module "^1.0.0"
 
-jest-runner@^21.0.0:
-  version "21.0.0"
-  resolved "https://registry.yarnpkg.com/jest-runner/-/jest-runner-21.0.0.tgz#8969dd22ff73911c84043cf16b6cfadf609f3d1f"
+jest-resolve@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-resolve/-/jest-resolve-21.0.2.tgz#57b2c20cbeca2357eb5e638d5c28beca7f38c3f8"
   dependencies:
-    jest-config "^21.0.0"
-    jest-docblock "^21.0.0"
-    jest-haste-map "^21.0.0"
-    jest-jasmine2 "^21.0.0"
-    jest-message-util "^21.0.0"
-    jest-runtime "^21.0.0"
-    jest-util "^21.0.0"
-    pify "^2.3.0"
-    throat "^3.0.0"
+    browser-resolve "^1.11.2"
+    chalk "^2.0.1"
+    is-builtin-module "^1.0.0"
+
+jest-runner@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-runner/-/jest-runner-21.0.2.tgz#1462d431d25f7744e8b5e03837bbf9e268dc8b15"
+  dependencies:
+    jest-config "^21.0.2"
+    jest-docblock "^21.0.2"
+    jest-haste-map "^21.0.2"
+    jest-jasmine2 "^21.0.2"
+    jest-message-util "^21.0.2"
+    jest-runtime "^21.0.2"
+    jest-util "^21.0.2"
+    pify "^3.0.0"
+    throat "^4.0.0"
     worker-farm "^1.3.1"
 
-jest-runtime@^21.0.0:
-  version "21.0.0"
-  resolved "https://registry.yarnpkg.com/jest-runtime/-/jest-runtime-21.0.0.tgz#54af290dc664a49ddc251c7d7ce1a5661afc1ead"
+jest-runtime@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-runtime/-/jest-runtime-21.0.2.tgz#ce26ba06bcd5501991bd994b1eacc0c7c7913895"
   dependencies:
     babel-core "^6.0.0"
-    babel-jest "^21.0.0"
+    babel-jest "^21.0.2"
     babel-plugin-istanbul "^4.0.0"
     chalk "^2.0.1"
     convert-source-map "^1.4.0"
     graceful-fs "^4.1.11"
-    jest-config "^21.0.0"
-    jest-haste-map "^21.0.0"
-    jest-regex-util "^21.0.0"
-    jest-resolve "^21.0.0"
-    jest-util "^21.0.0"
+    jest-config "^21.0.2"
+    jest-haste-map "^21.0.2"
+    jest-regex-util "^21.0.2"
+    jest-resolve "^21.0.2"
+    jest-util "^21.0.2"
     json-stable-stringify "^1.0.1"
     micromatch "^2.3.11"
     slash "^1.0.0"
     strip-bom "3.0.0"
     write-file-atomic "^2.1.0"
-    yargs "^7.0.2"
+    yargs "^9.0.0"
 
 jest-snapshot@^21.0.0:
   version "21.0.0"
@@ -1472,6 +1582,17 @@ jest-snapshot@^21.0.0:
     natural-compare "^1.4.0"
     pretty-format "^21.0.0"
 
+jest-snapshot@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-snapshot/-/jest-snapshot-21.0.2.tgz#5b8f4dd05c1759381db835451fba4bcd85a55611"
+  dependencies:
+    chalk "^2.0.1"
+    jest-diff "^21.0.2"
+    jest-matcher-utils "^21.0.2"
+    mkdirp "^0.5.1"
+    natural-compare "^1.4.0"
+    pretty-format "^21.0.2"
+
 jest-util@^21.0.0:
   version "21.0.0"
   resolved "https://registry.yarnpkg.com/jest-util/-/jest-util-21.0.0.tgz#62b3a3ec3ff91022ef7e1ffbcf3293424715919f"
@@ -1484,6 +1605,18 @@ jest-util@^21.0.0:
     jest-validate "^21.0.0"
     mkdirp "^0.5.1"
 
+jest-util@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-util/-/jest-util-21.0.2.tgz#3ee2380af25c414a39f07b23c84da6f2d5f1f76a"
+  dependencies:
+    callsites "^2.0.0"
+    chalk "^2.0.1"
+    graceful-fs "^4.1.11"
+    jest-message-util "^21.0.2"
+    jest-mock "^21.0.2"
+    jest-validate "^21.0.2"
+    mkdirp "^0.5.1"
+
 jest-validate@^21.0.0:
   version "21.0.0"
   resolved "https://registry.yarnpkg.com/jest-validate/-/jest-validate-21.0.0.tgz#f906d54eca2a485ffbfb2d8a7d58831c026e6dd5"
@@ -1493,11 +1626,20 @@ jest-validate@^21.0.0:
     leven "^2.1.0"
     pretty-format "^21.0.0"
 
-jest@21.0.1:
-  version "21.0.1"
-  resolved "https://registry.yarnpkg.com/jest/-/jest-21.0.1.tgz#746cddc89477beaea5b208e7017ca26652bfdb38"
+jest-validate@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest-validate/-/jest-validate-21.0.2.tgz#dd066b257bd102759c214747d73bed6bcfa4349d"
   dependencies:
-    jest-cli "^21.0.1"
+    chalk "^2.0.1"
+    jest-get-type "^21.0.2"
+    leven "^2.1.0"
+    pretty-format "^21.0.2"
+
+jest@21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/jest/-/jest-21.0.2.tgz#a5c9bdc9d4322ae672fe8cb3eaf25c268c5f04b2"
+  dependencies:
+    jest-cli "^21.0.2"
 
 js-tokens@^3.0.0:
   version "3.0.2"
@@ -1947,12 +2089,6 @@ os-homedir@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/os-homedir/-/os-homedir-1.0.2.tgz#ffbc4988336e0e833de0c168c7ef152121aa7fb3"
 
-os-locale@^1.4.0:
-  version "1.4.0"
-  resolved "https://registry.yarnpkg.com/os-locale/-/os-locale-1.4.0.tgz#20f9f17ae29ed345e8bde583b13d2009803c14d9"
-  dependencies:
-    lcid "^1.0.0"
-
 os-locale@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/os-locale/-/os-locale-2.0.0.tgz#15918ded510522b81ee7ae5a309d54f639fc39a4"
@@ -2053,6 +2189,10 @@ pify@^2.0.0, pify@^2.3.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"
 
+pify@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/pify/-/pify-3.0.0.tgz#e5a4acd2c101fdf3d9a4d07f0dbc4db49dd28176"
+
 pinkie-promise@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/pinkie-promise/-/pinkie-promise-2.0.1.tgz#2135d6dfa7a358c069ac9b178776288228450ffa"
@@ -2092,6 +2232,13 @@ pretty-format@^21.0.0:
     ansi-regex "^3.0.0"
     ansi-styles "^3.2.0"
 
+pretty-format@^21.0.2:
+  version "21.0.2"
+  resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-21.0.2.tgz#76adcebd836c41ccd2e6b626e70f63050d2a3534"
+  dependencies:
+    ansi-regex "^3.0.0"
+    ansi-styles "^3.2.0"
+
 private@^0.1.6:
   version "0.1.7"
   resolved "https://registry.yarnpkg.com/private/-/private-0.1.7.tgz#68ce5e8a1ef0a23bb570cc28537b5332aba63ef1"
@@ -2370,11 +2517,12 @@ sshpk@^1.7.0:
     jsbn "~0.1.0"
     tweetnacl "~0.14.0"
 
-string-length@^1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/string-length/-/string-length-1.0.1.tgz#56970fb1c38558e9e70b728bf3de269ac45adfac"
+string-length@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/string-length/-/string-length-2.0.0.tgz#d40dbb686a3ace960c1cffca562bf2c45f8363ed"
   dependencies:
-    strip-ansi "^3.0.0"
+    astral-regex "^1.0.0"
+    strip-ansi "^4.0.0"
 
 string-width@^1.0.1, string-width@^1.0.2:
   version "1.0.2"
@@ -2482,10 +2630,6 @@ test-exclude@^4.1.1:
     read-pkg-up "^1.0.1"
     require-main-filename "^1.0.1"
 
-throat@^3.0.0:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/throat/-/throat-3.2.0.tgz#50cb0670edbc40237b9e347d7e1f88e4620af836"
-
 throat@^4.0.0:
   version "4.1.0"
   resolved "https://registry.yarnpkg.com/throat/-/throat-4.1.0.tgz#89037cbc92c56ab18926e6ba4cbb200e15672a6a"
@@ -2740,10 +2884,6 @@ whatwg-url@^4.3.0:
     tr46 "~0.0.3"
     webidl-conversions "^3.0.0"
 
-which-module@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/which-module/-/which-module-1.0.0.tgz#bba63ca861948994ff307736089e3b96026c2a4f"
-
 which-module@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-2.0.0.tgz#d9ef07dce77b9902b8a3a8fa4b31c3e3f7e6e87a"
@@ -2818,36 +2958,12 @@ yallist@^2.1.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/yallist/-/yallist-2.1.2.tgz#1c11f9218f076089a47dd512f93c6699a6a81d52"
 
-yargs-parser@^5.0.0:
-  version "5.0.0"
-  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-5.0.0.tgz#275ecf0d7ffe05c77e64e7c86e4cd94bf0e1228a"
-  dependencies:
-    camelcase "^3.0.0"
-
 yargs-parser@^7.0.0:
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-7.0.0.tgz#8d0ac42f16ea55debd332caf4c4038b3e3f5dfd9"
   dependencies:
     camelcase "^4.1.0"
 
-yargs@^7.0.2:
-  version "7.1.0"
-  resolved "https://registry.yarnpkg.com/yargs/-/yargs-7.1.0.tgz#6ba318eb16961727f5d284f8ea003e8d6154d0c8"
-  dependencies:
-    camelcase "^3.0.0"
-    cliui "^3.2.0"
-    decamelize "^1.1.1"
-    get-caller-file "^1.0.1"
-    os-locale "^1.4.0"
-    read-pkg-up "^1.0.1"
-    require-directory "^2.1.1"
-    require-main-filename "^1.0.1"
-    set-blocking "^2.0.0"
-    string-width "^1.0.2"
-    which-module "^1.0.0"
-    y18n "^3.2.1"
-    yargs-parser "^5.0.0"
-
 yargs@^8.0.1:
   version "8.0.2"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-8.0.2.tgz#6299a9055b1cefc969ff7e79c1d918dceb22c360"
@@ -2866,6 +2982,24 @@ yargs@^8.0.1:
     y18n "^3.2.1"
     yargs-parser "^7.0.0"
 
+yargs@^9.0.0:
+  version "9.0.0"
+  resolved "https://registry.yarnpkg.com/yargs/-/yargs-9.0.0.tgz#efe5b1ad3f94bdc20423411b90628eeec0b25f3c"
+  dependencies:
+    camelcase "^4.1.0"
+    cliui "^3.2.0"
+    decamelize "^1.1.1"
+    get-caller-file "^1.0.1"
+    os-locale "^2.0.0"
+    read-pkg-up "^2.0.0"
+    require-directory "^2.1.1"
+    require-main-filename "^1.0.1"
+    set-blocking "^2.0.0"
+    string-width "^2.0.0"
+    which-module "^2.0.0"
+    y18n "^3.2.1"
+    yargs-parser "^7.0.0"
+
 yargs@~3.10.0:
   version "3.10.0"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-3.10.0.tgz#f7ee7bd857dd7c1d2d38c0e74efbd681d1431fd1"