chore(package): enforce higher babel plugin versions

Author: Awk34

Diff for: package.json

@@ -36,8 +36,8 @@
   },
   "dependencies": {
     "babel-eslint": "^6.1.2",
-    "babel-plugin-syntax-class-properties": "^6.5.0",
-    "babel-plugin-syntax-flow": "^6.5.0",
+    "babel-plugin-syntax-class-properties": "^6.13.0",
+    "babel-plugin-syntax-flow": "^6.13.0",
     "babel-plugin-transform-flow-strip-types": "^6.14.0",
     "bluebird": "^3.4.5",
     "chalk": "^1.1.0",