Upgrade to PHPUnit 7#700

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mbonneau wants to merge 2 commits intoratchetphp:0.4.xfrom

mbonneau:phpunit7

Commits on Sep 8, 2018

Use PHPUnit\Framework\TestCase instead of PHPUnit_Framework_TestCase
samnela
committed

Commits on Nov 15, 2018

Update to PHPUnit 7
mbonneau
committed