* feat: support setup helpers * feat: update to pybind11 2.6.0b1 * feat: bump to 2.6.0rc3 * chore: bump to 2.6.0 * ci: full release string * ci: dependabot * fix: conda-forge channel needed for 2.6.0
See https://github.com/pypa/pip/issues/5223 - there is a pip 9 to 10 upgrade issue that prevents a direct `pip install ... --upgrade pip` from working. While the issue is closed in pip upstream, it still seems to cause problems.