Set up automated releases

[SamyDjemai]

This could be done using either go-semantic-release for fully automated releases on merge, or release-please for PR-based releases. IMO go-semantic-release is easier to manage, but this should be discussed with the repo's maintainers

[benley]

I've started using release-please at work, so the next time I do updates in this repo I will try adding it here.