21.5.0
- switch to github actions
- docker build now builds multiarch images: ubuntu (default), debian and alpine docker images (linux/amd64,linux/arm,linux/arm64,linux/ppc64le)
- switch to golang 1.16
- update dependencies
- add custom working directory (thanks to @smlx)
- fix readme (thanks to @berendiwema)
- small refactoring