fix: forgot babel runtime for babel 7

Author: elevatebart

package-lock.json

@@ -35,6 +35,7 @@
   "license": "MIT",
   "homepage": "https://github.com/vue-styleguidist/vue-docgen-api#readme",
   "dependencies": {
+    "@babel/runtime": "^7.0.0",
     "doctrine": "^2.1.0",
     "hash-sum": "^1.0.2",
     "htmlparser2": "^3.9.2",
@@ -54,7 +55,6 @@
     "@babel/plugin-transform-runtime": "^7.0.0",
     "@babel/preset-env": "^7.1.6",
     "@babel/preset-flow": "^7.0.0",
-    "@babel/runtime": "^7.0.0",
     "babel-core": "7.0.0-bridge.0",
     "babel-eslint": "^8.2.6",
     "babel-helper-vue-jsx-merge-props": "^2.0.3",