Migrating away from better-reflection

[moufmouf]

There is no real need to have a dependency on better-reflection as most of what want is parsing a docblock. This is done by the phpDocumentor/docblock library and we can rely on that alone.

• this solves dependency issues because a lot of libs are needing nikic/php-parser that is also required by better-reflection

[coveralls]

Coverage increased (+0.1%) to 73.258% when pulling cbc8511 on moufmouf:removing_better_reflection into 8d7923f on thecodingmachine:master.