Added PHPUnit 6 support

Unfortunately, to allow support for PHPUnit 6 we have had to drop support for PHPUnit versions less than 5.7

Drop EOL PHP support

We have now dropped support for version of PHP that are end of life.

@SergeyZ also greatly improved our tests suite so we now run test against lots of PHPUnit version rather than just the latest one.

Added support for PHPUnit 5.1

PHPUnit 5.1 has changed an interface we use add tests for newer php version

v1.1.0

• Provide the ability to ignore test cases by using an ignore policy