Release v2.2.0

Release v2.1.0

Release v2.0.0

Release v1.8.0

Merge pull request nats-io#164 from nats-io/new_release

Prepare for next release [ci skip]

Release v1.7.6

Merge pull request nats-io#120 from nats-io/new_release

Prepare for next release [ci skip]

Merge pull request nats-io#104 from nats-io/prepare_new_releaes

Prepare for next release [ci skip]

Update release badge [ci skip]

Update version and doc for release 1.5.0 [ci skip]