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

Closes #25

Author: greenkeeper[bot]

package.json

@@ -63,7 +63,7 @@
     "babel-cli": "^6.26.0",
     "babel-core": "^6.26.0",
     "babel-eslint": "^8.1.2",
-    "babel-plugin-add-module-exports": "^0.2.1",
+    "babel-plugin-add-module-exports": "^0.3.1",
     "babel-plugin-transform-export-default": "^7.0.0-beta.3",
     "babel-preset-env": "^1.6.1",
     "chai": "^4.1.2",