Update package.json

package.json

@@ -101,7 +101,7 @@
     "postcss-loader": "3.0.0",
     "raw-loader": "0.5.1",
     "sass": "1.20.1",
-    "sass-loader": "git://github.com/webpack-contrib/sass-loader",
+    "sass-loader": "7.2.0",
     "selenium-server": "2.53.1",
     "semver": "5.6.0",
     "serviceworker-webpack-plugin": "1.0.1",