Overlaps moved to PostGIS namespace

[Gemorroj]

https://github.com/martin-georgiev/postgresql-for-doctrine/blob/v3.5.0/src/MartinGeorgiev/Doctrine/ORM/Query/AST/Functions/PostGIS/Overlaps.php

Snice https://github.com/martin-georgiev/postgresql-for-doctrine/releases/tag/v3.5.0 release && operator (Overlaps) moved to MartinGeorgiev\Doctrine\ORM\Query\AST\Functions\PostGIS namespace. But in documentation ist still in MartinGeorgiev\Doctrine\ORM\Query\AST\Functions. See https://github.com/martin-georgiev/postgresql-for-doctrine/blob/v3.5.0/docs/INTEGRATING-WITH-DOCTRINE.md for example.

[martin-georgiev]

Ah, this is indeed not intended - it slipped through the net. Thanks for flagging

[martin-georgiev]

Fixed in #448