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

Closes #7

Author: greenkeeper[bot]

package.json

@@ -14,7 +14,7 @@
   "license": "MIT",
   "devDependencies": {
     "babel-cli": "^6.3.17",
-    "babel-plugin-add-module-exports": "^0.2.1",
+    "babel-plugin-add-module-exports": "^0.3.1",
     "babel-preset-es2015": "^6.3.13",
     "babel-register": "^6.3.13",
     "chai": "^4.1.1",