Add 3.7 variant of subprocess.run (#2409)
Add 3.7 variant of subprocess.run (#2409)

Python 3.7 added:
  - `text` as an alias of `universal_newlines`
  - `capture_output` for `stdout=PIPE,stderr=PIPE`

cf. https://docs.python.org/3.7/library/subprocess.html

euresti/typeshed