2.2.0

Update dependency of PHPUnit from 7 to 8 and raise the PHP requirement to 7.3 - 8.0.

See #13

2.1.0

Update PHPUnit dependency from 6 to 7

2.0.0

Upgrade of PHPUnit from 5.7 to 6

1.0.0

Upgrade of PHPUnit from 5.3 to 5.7 for easier transition to 6 later.

0.3.2

• Add PHP version constraint and update PHPUnit to 5.3 #5

0.3.1

adjust composer.json

0.3.0

Update PHPUnit