chore(deps): update dependency @babel/plugin-external-helpers to v7.0.0-beta.55 (#43)

Author: renovate[bot]

package.json

@@ -34,7 +34,7 @@
   "devDependencies": {
     "@babel/cli": "7.0.0-beta.54",
     "@babel/core": "7.0.0-beta.54",
-    "@babel/plugin-external-helpers": "7.0.0-beta.54",
+    "@babel/plugin-external-helpers": "7.0.0-beta.55",
     "@babel/preset-env": "7.0.0-beta.54",
     "@babel/preset-typescript": "7.0.0-beta.54",
     "babel-plugin-add-module-exports": "0.2.1",

yarn.lock

@@ -150,6 +150,10 @@
   version "7.0.0-beta.54"
   resolved "https://registry.yarnpkg.com/@babel/helper-plugin-utils/-/helper-plugin-utils-7.0.0-beta.54.tgz#61d2a9a0f9a3e31838a458debb9eebd7bdd249b4"
 
+"@babel/[email protected]":
+  version "7.0.0-beta.55"
+  resolved "https://registry.yarnpkg.com/@babel/helper-plugin-utils/-/helper-plugin-utils-7.0.0-beta.55.tgz#31f40777efd6b961da8496a923c22d2b062b3f73"
+
 "@babel/[email protected]":
   version "7.0.0-beta.54"
   resolved "https://registry.yarnpkg.com/@babel/helper-regex/-/helper-regex-7.0.0-beta.54.tgz#8ac562f855f132fc68dfd10b132552555ac870d9"
@@ -218,11 +222,11 @@
   version "7.0.0-beta.54"
   resolved "https://registry.yarnpkg.com/@babel/parser/-/parser-7.0.0-beta.54.tgz#c01aa63b57c9c8dce8744796c81d9df121f20db4"
 
-"@babel/[email protected].54":
-  version "7.0.0-beta.54"
-  resolved "https://registry.yarnpkg.com/@babel/plugin-external-helpers/-/plugin-external-helpers-7.0.0-beta.54.tgz#14b1eae9a5b491acad878e5fbba59a81ed3ac4ce"
+"@babel/[email protected].55":
+  version "7.0.0-beta.55"
+  resolved "https://registry.yarnpkg.com/@babel/plugin-external-helpers/-/plugin-external-helpers-7.0.0-beta.55.tgz#5dddfecc842290d2fc39c12fbe35040bcda23008"
   dependencies:
-    "@babel/helper-plugin-utils" "7.0.0-beta.54"
+    "@babel/helper-plugin-utils" "7.0.0-beta.55"
 
 "@babel/[email protected]":
   version "7.0.0-beta.54"