chore(package): update microbundle to version 0.4.1

Closes #18

Author: greenkeeper[bot]

package.json

@@ -35,6 +35,6 @@
   "devDependencies": {
     "eslint": "^4.15.0",
     "eslint-config-developit": "^1.1.1",
-    "microbundle": "^0.3.0"
+    "microbundle": "^0.4.1"
   }
 }