2.0 release.

Signed-off-by: crynobone <crynobone@gmail.com>
Using self.version is cause some issue (travis-ci).

Signed-off-by: crynobone <crynobone@gmail.com>
Merge branch '2.0'
Update dependencies.

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