Merge branch 'release/2.21.0'

Merge branch 'release/2.20.3'

Merge branch 'release/2.20.2'

Merge branch 'release/2.20.1'

Merge branch 'release/2.20.0'

v2.19.0

Merge branch 'release/2.19.0'

Merge branch 'release/2.18.0'

updated version, changelog and docs list

updated version