Log Message:
Update devel/py-configargparse to 0.10.0.

pkgsrc changes:
o Get rid of VERSION variable and other PKGNAME hard-coding and use
  make(1) ``:tl'' modifier instead (no functional change intended)
o Use MASTER_SITE_PYPI instead of the full pypi URL.

Changes:
0.10.0
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 o Various misc bug fixes and improvements