Upgrade dependencies, drop React 0.13.x

Author: timnew

package.json

@@ -14,17 +14,17 @@
 "url": "https://github.com/JedWatson/react-codemirror/issues"
  },
 "dependencies":{
-"classnames": "^2.1.5",
+"classnames": "^2.2.0",
 "codemirror": "^5.7.0"
  },
 "devDependencies":{
 "gulp": "^3.9.0",
 "happiness": "^1.0.7",
-"react": "^0.13.3",
+"react": "^0.14.0",
 "react-component-gulp-tasks": "^0.7.6"
  },
 "peerDependencies":{
-"react": "^0.13 || ^0.14.0-beta"
+"react": "^0.14.0"
  },
 "browserify-shim":{
 "react": "global:React"