2.0.0-beta1

Main changes:

• PHP 7.2 support
• Adopted modified version of the Doctrine Coding Standard v4
• Less dependencies on the PHP reflection features

Merged pull requests:

• Allow Read-only Cache #72 (pdugas)
• Change license to MIT #69 (goetas)
• [2.0] simplified class metadata #67 (goetas)
• Fix an exception message #65 (hason)
• Actualized version constant. #64 (Aliance)

Closed issues:

• Change license to MIT #68
• Composer.lock is out of date #55
• consider changing chmod to @chmod #50
• Big performance hit when upgrading from 1.4.2 to 1.5.0 #44
• metadata name not present leads to exception #39