message: Disable velocity mock option
  This appears to have been removed in the beta
diff: @@ -35,7 +35,6 @@ const mockclock = require('../../mock-clock');
  import Adapter from "enzyme-adapter-react-16";
  import { configure, mount } from "enzyme";
  -import Velocity from 'velocity-animate';
  import MatrixClientContext from "../../../src/contexts/MatrixClientContext";
  import RoomContext from "../../../src/contexts/RoomContext";
  import DMRoomMap from "../../../src/utils/DMRoomMap";
  @@ -75,18 +74,10 @@ describe('MessagePanel', function() {
  return arg === "showDisplaynameChanges";
  });
  - // This option clobbers the duration of all animations to be 1ms
  - // which makes unit testing a lot simpler (the animation doesn't
  - // complete without this even if we mock the clock and tick it
  - // what should be the correct amount of time).
  - Velocity.mock = true;
  -
  DMRoomMap.makeShared();
  });
  afterEach(function() {
  - delete Velocity.mock;
  -
  clock.uninstall();
  });
  