feat(@schematics/angular): update karma to 4.1.x

Author: Alan Agius

packages/schematics/angular/workspace/files/package.json.template

@@ -33,7 +33,7 @@
     "codelyzer": "^5.0.0",
     "jasmine-core": "~3.4.0",
     "jasmine-spec-reporter": "~4.2.1",
-    "karma": "~4.0.1",
+    "karma": "~4.1.0",
     "karma-chrome-launcher": "~2.2.0",
     "karma-coverage-istanbul-reporter": "~2.0.1",
     "karma-jasmine": "~2.0.1",