Update to mockery 0.9.0

Signed-off-by: crynobone <crynobone@gmail.com>
Remove .gitattributes from export

Signed-off-by: crynobone <crynobone@gmail.com>
Add PHP 5.6 to travis-ci.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.1'