Attempts to resolved objects completely whenever possible (nelmio#756)

Closes nelmio#752

Fix a few issues (nelmio#740)

Create FixtureNotFoundException for resolver context (nelmio#713)

Prepare for PHP7.2 (nelmio#708)

* Run composer with --ignore-platform-reqs for nightly
* Run composer with weak deprecation warnings (PHPUnit still uses each())
* Rewrote usage of each() (which is deprecated in PHP7.2)

Fix usage of underscore in the function name (nelmio#702)

Update changelog for 2.3.0 (nelmio#694)

Add missing phpdoc (nelmio#659)

Remove useless file

Injected current in scope (nelmio#619)

Injected current in scope to make it accessible in the identity function.

Update documentation (nelmio#544)