Convert transport to use manager.

Signed-off-by: crynobone <crynobone@gmail.com>
Update testcase.

Signed-off-by: crynobone <crynobone@gmail.com>
Scrutinizer OCD.

Signed-off-by: crynobone <crynobone@gmail.com>
Update travis.

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.1' into 2.2
Merge branch '2.2'

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

Conflicts:
	src/Notifier/Mailer.php