chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

yarn.lock

@@ -1851,9 +1851,9 @@ tslib@^1.7.1:
   version "1.7.1"
   resolved "https://registry.yarnpkg.com/tslib/-/tslib-1.7.1.tgz#bc8004164691923a79fe8378bbeb3da2017538ec"
 
-tslint@5.4.3:
-  version "5.4.3"
-  resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.4.3.tgz#761c8402b80e347b7733a04390a757b253580467"
+tslint@5.5.0:
+  version "5.5.0"
+  resolved "https://registry.yarnpkg.com/tslint/-/tslint-5.5.0.tgz#10e8dab3e3061fa61e9442e8cee3982acf20a6aa"
   dependencies:
     babel-code-frame "^6.22.0"
     colors "^1.1.2"
@@ -1864,11 +1864,13 @@ tslint@5.4.3:
     resolve "^1.3.2"
     semver "^5.3.0"
     tslib "^1.7.1"
-    tsutils "^2.3.0"
+    tsutils "^2.5.1"
 
-tsutils@^2.3.0:
-  version "2.4.0"
-  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-2.4.0.tgz#ad4ce6dba0e5a3edbddf8626b7ca040782189fea"
+tsutils@^2.5.1:
+  version "2.5.1"
+  resolved "https://registry.yarnpkg.com/tsutils/-/tsutils-2.5.1.tgz#c2001390c79eec1a5ccfa7ac12d599639683e0cf"
+  dependencies:
+    tslib "^1.7.1"
 
 tunnel-agent@^0.6.0:
   version "0.6.0"