chore(deps): update dependency merge to v2 [security]

Author: renovate[bot]

package.json

@@ -142,7 +142,7 @@
     "karma-sourcemap-loader": "0.3.7",
     "karma-webpack": "1.8.1",
     "lodash": "4.17.19",
-    "merge": "1.2.1",
+    "merge": "2.1.1",
     "parse5": "2.2.3",
     "patch-package": "^6.5.1",
     "protractor": "4.0.14",