Merge pull request github#616 from github/release-2.21.0

Bump version: 2.21.0

Merge pull request github#585 from github/release-2.19.5

Bump version: 2.19.5

Merge pull request github#582 from github/release-2.20.2

Bump version: 2.20.2

Merge pull request github#579 from github/release-2.20.1

Bump version: 2.20.1

Merge pull request github#569 from github/release-2.19.4

Bump version: 2.19.4

Merge pull request github#564 from github/release-2.20.0

Bump version: 2.20.0

Merge pull request github#558 from github/release-2.19.3

Bump version: 2.19.3

Merge pull request github#542 from github/release-2.19.2

Bump version: 2.19.2

Merge pull request github#531 from github/release-2.19.1

Bump version: 2.19.1

Merge pull request github#523 from github/release-2.19.0

Bump version: 2.19.0