chore(deps): lock file maintenance

yarn.lock

@@ -21,8 +21,8 @@
   resolved "https://registry.yarnpkg.com/@types/jest/-/jest-21.1.10.tgz#dcacb5217ddf997a090cc822bba219b4b2fd7984"
 
 "@types/node@*":
-  version "11.9.5"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-11.9.5.tgz#011eece9d3f839a806b63973e228f85967b79ed3"
+  version "11.10.4"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-11.10.4.tgz#3f5fc4f0f322805f009e00ab35a2ff3d6b778e42"
 
 "@types/node@8.10.42":
   version "8.10.42"
@@ -68,8 +68,8 @@ acorn@^4.0.4:
   resolved "https://registry.yarnpkg.com/acorn/-/acorn-4.0.13.tgz#105495ae5361d697bd195c825192e1ad7f253787"
 
 ajv@^6.5.5:
-  version "6.9.2"
-  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.9.2.tgz#4927adb83e7f48e5a32b45729744c71ec39c9c7b"
+  version "6.10.0"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.10.0.tgz#90d0d54439da587cd7e843bfb7045f50bd22bdf1"
   dependencies:
     fast-deep-equal "^2.0.1"
     fast-json-stable-stringify "^2.0.0"
@@ -1858,8 +1858,8 @@ js-tokens@^3.0.2:
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
 
 js-yaml@^3.7.0:
-  version "3.12.1"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.12.1.tgz#295c8632a18a23e054cf5c9d3cecafe678167600"
+  version "3.12.2"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.12.2.tgz#ef1d067c5a9d9cb65bd72f285b5d8105c77f14fc"
   dependencies:
     argparse "^1.0.7"
     esprima "^4.0.0"
@@ -2692,8 +2692,8 @@ readable-stream@^2.0.2, readable-stream@^2.0.6:
     util-deprecate "~1.0.1"
 
 readable-stream@^3.1.1:
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.1.1.tgz#ed6bbc6c5ba58b090039ff18ce670515795aeb06"
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.2.0.tgz#de17f229864c120a9f56945756e4f32c4045245d"
   dependencies:
     inherits "^2.0.3"
     string_decoder "^1.1.1"