ci: automated release process

[fryorcraken]

This is a change request

Problem

The release process is manual, hence it is difficult to release early, release often.

This repo will become a multi-repo soon #802 and hence we need to make the releasing of the various packages easier.

Ideally, one button click should be enough for a maintainer to release and publish.

Also, automation of the changelog should be considered, using Conventional Commits

Acceptance Criteria

• Changelog is maintained from commits using conventional commits
• New PR automatically opens when changes are merged, version (patch, minor) is deduced from conventional commits (breaking change or not)
• Maintainer can merge PR for release to happen
• Minimum manual action should still be needed from the maintainer
• Automated release and publication of all merged PR under a release candidate version (ie 0.23.0-<short commit hash>) with a next tag on npmjs.com Auto-release merged PRs #896

Notes

Check out the following repos for ideas:

• https;//github.com/libp2p/js-libp2p
• https://github.com/chainSafe/js-libp2p-gossipsub

[weboko]

How it will work with release-please:

• PR will be automatically created and updated based on master;
• major increment will be made only if breaking change is introduced as per conventional commit spec;
• the only action is for maintainer to complete a PR;