Miutil

- fix `setup.py install` for `matlab.engine` (32, 31)
+ PEP440 non-compliance work-around (vis. https://github.com/pypa/setuptools/issues/3772)
+ fallback to `pip install`
+ improve error messages
- misc build/test/framework updates (32)
+ migrate `setup.{cfg,py}` => `pyproject.toml`
+ bump minimum `nibabel` version
+ bump `pre-commit`
+ fix deployment

- `mlab`: drop `engine.connect_matlab` to fix `matlab.engine.EngineError: Unable to connect to matlab session` (30)
- `cuinfo`: support `pynvml>=11.5` (30)
- `nii`: suppress `Nifti1Image` `dtype` warning (30)
- drop Python<=3.6 support
- misc code tidy
- misc tests/build/CI framework updates

- fixed `nii` orientation bug (28)

- add `plot.imscroll(sharexy=None)` (27)
- add `plot.imscroll(show=False)` (25)
- fix `imio.nii.getnii()` (27)
- misc tidy & framework updates

- `mlab.beautify`: bump MBeautify version (26)
- drop `six`
- misc CI framework updates
- replace `black` => `yapf` linter
- misc test updates

- add `fdio.nsort` (24)
- add conda builds
- misc test framework updates
- misc build framework updates