Merge pull request #834 from xrelkd/release/0.21.1

Release `0.21.1`

Merge pull request #708 from xrelkd/release/0.21.0

Release `0.21.0`

Merge pull request #692 from xrelkd/release/0.20.1

Release `0.20.1`

Merge pull request #652 from xrelkd/release/0.20.0

Release `0.20.0`

Merge pull request #602 from xrelkd/release/0.19.0

Release `0.19.0`

Merge pull request #515 from xrelkd/hotfix/0.18.3

Release `0.18.3`

Merge pull request #513 from xrelkd/release/0.18.2

Release `0.18.2`

Merge pull request #457 from xrelkd/release/0.18.1

Release `0.18.1`

Merge pull request #432 from xrelkd/release/0.18.0

Release `0.18.0`

Merge pull request #395 from xrelkd/release/0.17.0

Release `0.17.0`