release v3.1.2

Merge pull request #758 from wurmlab/tt/v3.1.1-release

Release v3.1.1

Merge pull request #748 from wurmlab/tt/v3.1.0

Release v3.1.0

version 3.0.1

version 3.0

Bump version to 2.2.0

gem version bump

Change version number to 2.0.0

Use github actions to build docker image and push to docker hub

Because it no longer seems to be possible to use the automated
build functionality on docker hub

Signed-off-by: Anurag Priyam <anurag.priyam@kws.com>

Support filenames with spaces