chore(package): update lodash to version 4.15.0 (#1122)

https://greenkeeper.io/

package.json

@@ -63,7 +63,7 @@
     "karma-ng-html2js-preprocessor": "~1.0.0",
     "karma-sauce-launcher": "~1.0.0",
     "karma-sourcemap-loader": "~0.3.7",
-    "lodash": "~4.14.0",
+    "lodash": "~4.15.0",
     "merge-stream": "~1.0.0",
     "npm-check-updates": "~2.8.0",
     "proxy-middleware": "~0.15.0",