diff --git a/yarn.lock b/yarn.lock
index 9a96817..1545e3e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -16,11 +16,7 @@
   version "21.1.10"
   resolved "https://registry.yarnpkg.com/@types/jest/-/jest-21.1.10.tgz#dcacb5217ddf997a090cc822bba219b4b2fd7984"
 
-"@types/node@*":
-  version "8.5.2"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-8.5.2.tgz#83b8103fa9a2c2e83d78f701a9aa7c9539739aa5"
-
-"@types/node@8.5.7":
+"@types/node@*", "@types/node@8.5.7":
   version "8.5.7"
   resolved "https://registry.yarnpkg.com/@types/node/-/node-8.5.7.tgz#9c498c35af354dcfbca3790fb2e81129e93cf0e2"
 
@@ -184,8 +180,8 @@ assert-plus@^0.2.0:
   resolved "https://registry.yarnpkg.com/assert-plus/-/assert-plus-0.2.0.tgz#d74e1b87e7affc0db8aadb7021f3fe48101ab234"
 
 assertion-error@^1.0.1:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/assertion-error/-/assertion-error-1.0.2.tgz#13ca515d86206da0bac66e834dd397d87581094c"
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/assertion-error/-/assertion-error-1.1.0.tgz#e60b6b0e8f301bd97e5375215bda406c85118c0b"
 
 astral-regex@^1.0.0:
   version "1.0.0"
@@ -1282,8 +1278,8 @@ is-builtin-module@^1.0.0:
     builtin-modules "^1.0.0"
 
 is-ci@^1.0.10:
-  version "1.0.10"
-  resolved "https://registry.yarnpkg.com/is-ci/-/is-ci-1.0.10.tgz#f739336b2632365061a9d48270cd56ae3369318e"
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/is-ci/-/is-ci-1.1.0.tgz#247e4162e7860cebbdaf30b774d6b0ac7dcfe7a5"
   dependencies:
     ci-info "^1.0.0"
 
@@ -2166,8 +2162,10 @@ p-finally@^1.0.0:
   resolved "https://registry.yarnpkg.com/p-finally/-/p-finally-1.0.0.tgz#3fbcfb15b899a44123b34b6dcc18b724336a2cae"
 
 p-limit@^1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-1.1.0.tgz#b07ff2d9a5d88bec806035895a2bab66a27988bc"
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-1.2.0.tgz#0e92b6bedcb59f022c13d0f1949dc82d15909f1c"
+  dependencies:
+    p-try "^1.0.0"
 
 p-locate@^2.0.0:
   version "2.0.0"
@@ -2175,6 +2173,10 @@ p-locate@^2.0.0:
   dependencies:
     p-limit "^1.1.0"
 
+p-try@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/p-try/-/p-try-1.0.0.tgz#cbc79cdbaf8fd4228e13f621f2b1a237c1b207b3"
+
 parse-glob@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/parse-glob/-/parse-glob-3.0.4.tgz#b2c376cfb11f35513badd173ef0bb6e3a388391c"
@@ -2823,7 +2825,7 @@ tsconfig@^7.0.0:
     strip-bom "^3.0.0"
     strip-json-comments "^2.0.0"
 
-tslib@^1.0.0, tslib@^1.7.1, tslib@^1.8.0:
+tslib@^1.0.0, tslib@^1.7.1, tslib@^1.8.1:
   version "1.8.1"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.8.1.tgz#6946af2d1d651a7b1863b531d6e5afa41aa44eac"
 
@@ -2893,10 +2895,10 @@ tsutils@^1.4.0:
   resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-1.9.1.tgz#b9f9ab44e55af9681831d5f28d0aeeaf5c750cb0"
 
 tsutils@^2.12.0, tsutils@^2.12.1, tsutils@^2.8.0:
-  version "2.14.0"
-  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-2.14.0.tgz#bc5291622aa2448c1baffc544bcc14ecfa528fb7"
+  version "2.15.0"
+  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-2.15.0.tgz#90831e5908cca10b28cdaf83a56dcf8156aed7c6"
   dependencies:
-    tslib "^1.8.0"
+    tslib "^1.8.1"
 
 tunnel-agent@^0.6.0:
   version "0.6.0"