**Maintenance release, no features or fixes**
Infrastructure
- CI speedups (819)
- Split out release to separate job so the PyPI Upload docker image isn't pulled on normal runs
- Clean up CodeQL
- Bump poetry 1.1.x -> 1.2.x
- Bump libtmux 0.15.1 -> 0.15.7
- 0.15.7 (move `.coveragerc` -> `pyproject.toml`)
- 0.15.6 (823, pytest fixes, packaging improvements)
- 0.15.3 (821, pytest plugin improvements, root-level
conftest.py)
- Move `.coveragerc` -> `pyproject.toml` (824)
Packaging
- Remove `MANIFEST.in`
This is handled by poetry's `include` in pyproject.toml.
- Remove `.tmuxp-before-script.sh` from `.tmuxp.yaml`