Small tweak.

Signed-off-by: crynobone <crynobone@gmail.com>
Add testcase for Orchestra\Support\Traits\ObservableTrait.

Signed-off-by: crynobone <crynobone@gmail.com>
Clean up some code to avoid strict mode warning.

Signed-off-by: crynobone <crynobone@gmail.com>
Add docblock.

Signed-off-by: crynobone <crynobone@gmail.com>
Add addition test case.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.2'