add regenerator to unbreak older tests

Author: leebyron

package.json

@@ -23,6 +23,7 @@
   "babel": {
     "plugins": [
       "transform-async-to-generator",
+      "transform-regenerator",
       "transform-class-properties",
       "transform-flow-strip-types",
       "transform-es2015-template-literals",
@@ -97,6 +98,7 @@
     "babel-plugin-transform-es2015-spread": "6.8.0",
     "babel-plugin-transform-es2015-template-literals": "6.8.0",
     "babel-plugin-transform-flow-strip-types": "6.14.0",
+    "babel-plugin-transform-regenerator": "6.14.0",
     "chai": "3.5.0",
     "coveralls": "2.11.14",
     "eslint": "3.5.0",