Log Message:
py-cheroot: updated to 6.3.1

v6.3.1
- :cp-issue:1618: Ignore OpenSSL's 1.0+ Error 0 under Python 2 while
  wrapping a socket.

v6.3.0
- :pr:87: Add cheroot command and runpy launcher to
  launch a WSGI app from the command-line.