Add default export functionality to babel

package.json

@@ -6,6 +6,7 @@
   "dependencies": {},
   "devDependencies": {
     "babel-cli": "^6.7.5",
+    "babel-plugin-add-module-exports": "^0.1.2",
     "babel-preset-es2015": "^6.6.0"
   },
   "scripts": {
@@ -13,7 +14,12 @@
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "babel": {
-    "presets": ["es2015"]
+    "presets": [
+      "es2015"
+    ],
+    "plugins": [
+      "add-module-exports"
+    ]
   },
   "repository": {
     "type": "git",