chore(package): update mime to version 2.2.1

Closes #37

Author: greenkeeper[bot]

package.json

@@ -48,7 +48,7 @@
     "gulp-util": "^3.0.7",
     "jsdom": "^9.8.3",
     "jsx-chai": "^4.0.0",
-    "mime": "^1.3.4",
+    "mime": "^2.2.1",
     "mkdirp": "^0.5.1",
     "mocha": "^3.2.0",
     "mocha-clean": "^1.0.0",