chore(package): update babel-plugin-add-module-exports to version 0.3.1

Closes #17

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "ava": "^0.25.0",
     "babel-cli": "^6.26.0",
     "babel-eslint": "^8.0.0",
-    "babel-plugin-add-module-exports": "^0.2.1",
+    "babel-plugin-add-module-exports": "^0.3.1",
     "babel-preset-env": "^1.6.0",
     "babel-preset-stage-0": "^6.24.1",
     "babel-register": "^6.26.0",