Test suite fails with react-dom 16.6.0

[papandreou]

Upgrading react-dom from 16.5.2 to 16.6.0 makes 83 tests fail when running this part of the test suite:

mocha --require babel-core/register src/tests/general/*.spec.js

Bisecting in the react repo reveals that it broke when facebook/react#13902 was merged.

[bruderstein]

Closing this as 6.0.0 supports 16.9 and above, so this is probably no longer an issue any more.

[papandreou]

Awesome! Remember to push the new release 😇