Merge pull request oauthlib#548 from skion/2.1.0

Release 2.1.0

Fix Travis config (oauthlib#529)

* Fix indentation in Travis config.
* Fill GitHub OAuth key.
* Deploy tags from all branches.

(cherry picked from commit e2f40a9)

Version bump 2.0.6

Version bump 2.0.5

Bump version.

Bump version to 2.0.3.

Bump version to 2.0.2.

Bump version to 2.0.1.

Bumped version.

Bumped version.