Setuptools-scm

- drop support for eol python versions
- 214 - fix misuse in surrogate-escape api
- add the node-and-timestamp local version scheme
- respect git export ignores
- avoid shlex.split on windows
- fix 218 - better handling of mercurial edge-cases with tag commits
being considered as the tagged commit
- fix 223 - remove the dependency on the internal `SetuptoolsVersion`
as it was removed after long-standing deprecation

- Fix 174 with 207: Reuse samefile backport as developed in
jaraco.windows, and only use the backport where samefile is not
available.

- fix 171 by unpinning the py version to allow a fixed one to get
installed

- fix 167 by correctly respecting preformatted version metadata from
PKG-INFO/EGG-INFO

- fix issue 164: iterate all found entry points to avoid errors when
pip remakes egg-info
- enhance self-use to enable pip install from github again

- bring back correctly getting our version in the own sdist, finalizes
114
- fix issue 150: strip local components of tags