message: Fix Travis build on Node 8.
  Error names now include their new error code:
  Build log:
diff: @@ -100,7 +100,7 @@ suite('service-worker', () => {
  'generateServiceWorker() resolved, expected rejection!');
  },
  (error: Error) => {
  - assert.equal(error.name, 'AssertionError');
  + assert.include(error.name, 'AssertionError');
  assert.equal(
  error.message, '`project` & `buildRoot` options are required');
  });
  @@ -115,7 +115,7 @@ suite('service-worker', () => {
  'generateServiceWorker() resolved, expected rejection!');
  },
  (error: Error) => {
  - assert.equal(error.name, 'AssertionError');
  + assert.include(error.name, 'AssertionError');
  assert.equal(error.message, '`project` option is required');
  });
  });
  @@ -129,7 +129,7 @@ suite('service-worker', () => {
  'generateServiceWorker() resolved, expected rejection!');
  },
  (error: Error) => {
  - assert.equal(error.name, 'AssertionError');
  + assert.include(error.name, 'AssertionError');
  assert.equal(error.message, '`buildRoot` option is required');
  });
  });
  