Changed log

Add php-7.2, php-7.3 and php-7.4 version tests during Travis CI build.
Since the php-7.x versions are released, the hhvm support should be removed.
To support future PHPUnit versions, it's good to use PHPUnit\Framework\TestCase namespace.
The PSR-0 autoloading is deprecated and using PSR-4 autoloading instead.
Let all class instances use use syntax to define class with namespace on the head of PHP files.
Removing additional whitesapces.
The get_magic_quotes_gpc function is deprecated since php-7.4 version. And it should use the function_exists to check get_magic_quotes_gpc is existed inside if condition.

vlucas / bulletphp