message: refactor(service-worker): set http method in MockRequest constructor
  Enable to create mocks for mutating http requests in tests
  to check more scenarios.
  PR Close
diff: @@ -110,6 +110,9 @@ export class MockRequest extends MockBody implements Request {
  if (init.credentials !== undefined) {
  this.credentials = init.credentials;
  }
  + if (init.method !== undefined) {
  + this.method = init.method;
  + }
  }
  clone(): Request {
  