Versioning

We use semver
- Major: Breaking change
- Minor: New features that do not break the existing API
- Patch: Fixes
We maintain a CHANGELOG
A branch is maintained for each previous major version so that fixes can be backported.
- E.g. v1, v2 if we are on v3
Releases are cut from master and tagged when ready e.g. v1.0.0.

Branching