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",