Merge pull request fluxcd#624 from weaveworks/release-v1.0.0

Release v1.0.0

Merge pull request fluxcd#589 from weaveworks/release-1.0.0-rc.5

Release v1.0.0-rc.5

Merge pull request fluxcd#547 from weaveworks/prep-1.0.0-rc.4

Release v1.0.0-rc.4

Merge pull request fluxcd#520 from weaveworks/release-v1.0.0-rc.3

Release v1.0.0-rc.3

Merge pull request fluxcd#512 from weaveworks/rc.2

Release Flagger v1.0.0-rc.2

Merge pull request fluxcd#476 from weaveworks/fix-release-notes

build: generate release notes on disk

Merge pull request fluxcd#422 from weaveworks/prep-0.23.0

Release v0.23.0

Merge pull request fluxcd#412 from weaveworks/prep-release-0.22.0

Release v0.22.0

Merge pull request fluxcd#400 from weaveworks/release-0.21.0

Release 0.21.0

Merge pull request fluxcd#389 from weaveworks/release-0.20.4

Release 0.20.4