[changed] Update eslint. Dev dependency.

Author: AlexKVal

package.json

@@ -53,7 +53,7 @@
     "colors": "^1.0.3",
     "css-loader": "^0.14.1",
     "es5-shim": "^4.1.0",
-    "eslint": "0.21.2",
+    "eslint": "0.22.1",
     "eslint-plugin-mocha": "^0.2.2",
     "eslint-plugin-react": "^2.1.0",
     "express": "^4.12.3",