Merge pull request steemit#3496 from steemit/20190901-bump-version

Bump version to 0.22.1

Merge pull request steemit#3497 from steemit/0.22.x

Merge 0.22.1 to stable

Tagging v0.22.0

Tagging v0.22.0-no-mira

Merge pull request steemit#3484 from steemit/0.21.x

0.21.x

Merge pull request steemit#3482 from steemit/downvote-overflow-fix

Downvote overflow fix

Build 0.21.0 without mira

Build 0.20.12 without mira

Build 0.20.12 without mira

Merge pull request steemit#3450 from steemit/20190802-force-open-revi…

…sion

Expand --force-open to skip db revision and validate invariants check