Flip assertEqauls() arguments

[zembrowski]

Cf. https://phpunit.readthedocs.io/en/stable/assertions.html#assertequals

[neenjaw]

Thanks for opening a PR to help improve the PHP track!

I'll need to check more closely, but I think this work is already being done in an open PR in #357 by @codedge which was opened 2 days ago.

If it isn't overlapping I'll take a look at this tonight to review it.

[neenjaw]

Awesome! I think @codedge missed part of this meetup test file, which your PR covers! Most appreciated!!