chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

yarn.lock

@@ -550,9 +550,9 @@ combined-stream@^1.0.5, combined-stream@~1.0.5:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@2.11.0:
-  version "2.11.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-2.11.0.tgz#157152fd1e7a6c8d98a5b715cf376df928004563"
+commander@2.15.1:
+  version "2.15.1"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.15.1.tgz#df46e867d0fc2aec66a34662b406a9ccafff5b0f"
 
 commander@^2.12.2, commander@^2.8.1, commander@^2.9.0:
   version "2.13.0"
@@ -1408,9 +1408,9 @@ graceful-fs@^4.1.11, graceful-fs@^4.1.2, graceful-fs@^4.1.6:
   version "4.1.11"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.1.11.tgz#0e8bdfe4d1ddb8854d64e04ea7c00e2a026e5658"
 
-growl@1.10.3:
-  version "1.10.3"
-  resolved "https://registry.yarnpkg.com/growl/-/growl-1.10.3.tgz#1926ba90cf3edfe2adb4927f5880bc22c66c790f"
+growl@1.10.5:
+  version "1.10.5"
+  resolved "https://registry.yarnpkg.com/growl/-/growl-1.10.5.tgz#f2735dc2283674fa67478b10181059355c369e5e"
 
 handlebars@^4.0.3:
   version "4.0.11"
@@ -1447,6 +1447,10 @@ has-flag@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-2.0.0.tgz#e8207af1cc7b30d446cc70b734b5e8be18f88d51"
 
+has-flag@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
+
 has-value@^0.3.1:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/has-value/-/has-value-0.3.1.tgz#7b1f58bada62ca827ec0a2078025654845995e1f"
@@ -2209,21 +2213,21 @@ mkdirp@0.5.1, mkdirp@^0.5.0, mkdirp@^0.5.1:
   dependencies:
     minimist "0.0.8"
 
-mocha@5.1.1:
-  version "5.1.1"
-  resolved "https://registry.yarnpkg.com/mocha/-/mocha-5.1.1.tgz#b774c75609dac05eb48f4d9ba1d827b97fde8a7b"
+mocha@5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/mocha/-/mocha-5.2.0.tgz#6d8ae508f59167f940f2b5b3c4a612ae50c90ae6"
   dependencies:
     browser-stdout "1.3.1"
-    commander "2.11.0"
+    commander "2.15.1"
     debug "3.1.0"
     diff "3.5.0"
     escape-string-regexp "1.0.5"
     glob "7.1.2"
-    growl "1.10.3"
+    growl "1.10.5"
     he "1.1.1"
     minimatch "3.0.4"
     mkdirp "0.5.1"
-    supports-color "4.4.0"
+    supports-color "5.4.0"
 
 ms@2.0.0:
   version "2.0.0"
@@ -3228,11 +3232,11 @@ stryker@0.19.1:
     tslib "^1.5.0"
     typed-rest-client "^1.0.7"
 
-supports-color@4.4.0:
-  version "4.4.0"
-  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-4.4.0.tgz#883f7ddabc165142b2a61427f3352ded195d1a3e"
+supports-color@5.4.0:
+  version "5.4.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.4.0.tgz#1c6b337402c2137605efe19f10fec390f6faab54"
   dependencies:
-    has-flag "^2.0.0"
+    has-flag "^3.0.0"
 
 supports-color@^2.0.0:
   version "2.0.0"