PHP7 compliance: annotation classes sometimes use reserved names

[zio-mitch]

The name of some of the annotations e.g. "String", "Boolean" are considered reserverd words in php7, so them cannot be used to name a class:
http://php.net/manual/en/reserved.other-reserved-words.php

If is intended to support PHP7, I can start working to this fix.

[alcaeus]

Hi! Thanks for the offer - we have indeed taken care of this already: #1205 prevents importing the annotation classes that use reserved words - so if you use @String somewhere it would fail because the annotation class was not found. To be consistent across our mappings and with ORM, #1318 deprecates all type annotations (e.g. @String, @Int) and replaces them with @Field(type="string"). This is what you should use for PHP 7.

[ZioMitch]

Thank you so much for the help!