fixed devDeps about rollup-plugin-alias

package.json

@@ -60,7 +60,7 @@
     "nightwatch": "^0.8.18",
     "phantomjs-prebuilt": "^2.1.3",
     "rollup": "^0.25.8",
-    "rollup-plugin-alias": "^1.0.2",
+    "rollup-plugin-alias": "^1.2.0",
     "rollup-plugin-babel": "^2.4.0",
     "rollup-plugin-replace": "^1.1.0",
     "selenium-server": "2.53.0",