fix(deps): upgrade vulnerable dependencies

Author: Kumar Harsh

package.json

@@ -38,9 +38,9 @@
     "eslint-plugin-prettier": "2.6.0",
     "husky": "^0.14.3",
     "jasmine-core": "^3.1.0",
-    "karma": "^2.0.2",
+    "karma": "^4.0.1",
     "karma-jasmine": "^1.1.2",
-    "karma-sauce-launcher": "^1.2.0",
+    "karma-sauce-launcher": "^2.0.2",
     "prettier": "1.12.1",
     "semantic-release": "^15.4.1"
   },