Setuptools-scm

- add `no-local-version` local scheme and improve documentation for
schemes

- fix 403: also sort out resource warnings when dealing with git file
finding

- fix 399: ensure the git file finder terminates subprocess after
reading archive

- fix 395: correctly transfer tag regex in the Configuration
constructor
- rollback \--first-parent for git describe as it turns out to be a
regression for some users

- pull in 377 to fix 374: correctly set up the default version
scheme for pyproject usage. this bugfix got missed when rushing the
release.

- fix 181 - add support for projects built under setuptools
declarative config by way of the
setuptools.finalize_distribution_options hook in Setuptools 42.
- fix 305 - ensure the git file finder closes file descriptors even
when errors happen
- fix 381 - clean out env vars from the git hook system to ensure
correct function from within
- modernize docs wrt importlib.metadata

*edited*

- use \--first-parent for git describe