CONTRIB-4144 Bump to 2013031200 (v2.2.6)

Changes:
- CONTRIB-4160: fail tests if there are unexpected results (errors & warnings).
- CONTRIB-4150: allow phpdocs block before define().
- CONTRIB-4186: fix CSS / rendering of results.
- CONTRIB-3582: allow to specify excluded paths.
- CONTRIB-3562: skip indentation checks on inline html sections within PHP code.