Merge branch 'develop' - v2.2.0 release

Version increment for v2.1.1 release

Merge branch 'develop' - v2.1.0 release.

Merge branch 'hotfix' - v2.0.1 release.

Merge branch 'develop' - v2.0.0 release.

Merge branch 'hotfix' - v1.8.8 release.

Merge branch 'hotfix' - v1.8.7 release.

Merge branch 'hotfix' - v1.8.5 release.

Merge branch 'hotfix' - v1.8.4 release.

Merge branch 'develop' - v1.8.3 release.