Version bump

Bump version to 0.20.0

Bump version to 0.19.3

Merge pull request wp-cli#1999 from wp-cli/1898-cached-partials-0-18-1

WP-CLI shouldn't use cached WP partials in full upgrades (for v0.18.1)

Bump version to 0.17.2

Bump version to v0.19.2

Version bump

Bump stable to v0.19.0

Version bump

Version bump