Merge pull request #431 from gunnsth/v3-release-rc1

Update version info for v3.0.0-rc.1 release

Remove unnecessary sample signature file

Merge pull request #339 from unidoc/v3-release-alpha.2

release v3.0.0-alpha.2

Merge pull request #312 from unidoc/v3-add-codecov-yaml

Add codecov.yaml configuration in v3

Release v2.2.0

Bump version to 2.1.1

Release 2.1.0 version

Improved CS handling with Separation, Lab color ranges.

Update version to v2.0.0

Release v2.0.0-rc.1