Log Message:
py-werkzeug: updated to 0.15.6

Version 0.15.6
- Work around a bug in pip that caused the reloader to fail on
  Windows when the script was an entry point. This fixes the issue
  with Flask's flask run command failing with "No module named
  Scripts\flask".
- ProxyFix trusts the X-Forwarded-Proto header by default.
- The deprecated num_proxies argument to ProxyFix sets
  x_for, x_proto, and x_host to match 0.14 behavior. This
  is intended to make intermediate upgrades less disruptive, but the
  argument will still be removed in 1.0.