chore(package): update babel-plugin-espower to version 3.0.1

Closes #199

Author: greenkeeper[bot]

package.json

@@ -112,7 +112,7 @@
     "awesome-typescript-loader": "^3.0.8",
     "ava": "^0.18.2",
     "babel-loader": "^6.3.2",
-    "babel-plugin-espower": "^2.3.2",
+    "babel-plugin-espower": "^3.0.1",
     "babel-plugin-dynamic-import-node": "^1.2.0",
     "babel-plugin-syntax-trailing-function-commas": "^6.22.0",
     "babel-plugin-transform-async-generator-functions": "^6.24.1",