Reference: [monoprop](https://github.com/algorithmiq/monoprop/blob/main/.github/PULL_REQUEST_TEMPLATE.md). Port `.github/PULL_REQUEST_TEMPLATE.md` and adapt the checklist to this repo (tests, lints, docs, changelog label).
Reference: monoprop.
Port
.github/PULL_REQUEST_TEMPLATE.mdand adapt the checklist to this repo (tests, lints, docs, changelog label).