Improve deprecated calls with FQCN

Introduced in #42 (closed) and #33 (closed) we check for deprecated and removed function, methods and constants. This is done without much magic, and it might be possible to improve it without much knowledge. PHP Mass Detection already is able to resolve imported namespaces to FQCN, if we can integrate that, we are able to check at least static calls to constants and methods securely and provide errors instead of warnings. Also if possible we might update the calls and auto migrate the code.