chore(package): update fixpack to version 3.0.4

Closes #19

Author: greenkeeper[bot]

package.json

@@ -22,7 +22,7 @@
     "babel-core": "^6.25.0",
     "babel-preset-es2015": "^6.24.1",
     "babel-preset-stage-3": "^6.24.1",
-    "fixpack": "^2.3.1",
+    "fixpack": "^3.0.4",
     "standard": "^11.0.0"
   },
   "files": [