chore: release 2.0.0-rc.27

Merge pull request bootstrap-vue#3610 from bootstrap-vue/dev

chore: release v2.0.0-rc.26

Update CHANGELOG.md

chore: release v2.0.0-rc.24

chore: release 2.0.0-rc.23

chore: release v2.0.0-rc.22

chore: release 2.0.0-rc.21

chore: release 2.0.0-rc.20

Merge pull request bootstrap-vue#3096 from bootstrap-vue/dev

chore: release 2.0.0-rc.19

Merge pull request bootstrap-vue#3049 from bootstrap-vue/dev

chore: release v2.0.0-rc.18