[Checkins] [zopefoundation/zope.sendmail] 85ca70: Upgrade setuptools

[Marius Gedminas]

  Branch: refs/heads/appveyor
  Home:   https://github.com/zopefoundation/zope.sendmail
  Commit: 85ca7064cb6a9cf7e015881c057824e479203849
      https://github.com/zopefoundation/zope.sendmail/commit/85ca7064cb6a9cf7e015881c057824e479203849
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2020-08-20 (Thu, 20 Aug 2020)

  Changed paths:
    M appveyor.yml

  Log Message:
  -----------
  Upgrade setuptools

I'm hoping this fixes the weird error on Python 3.5 on Appveyor.

Traceback (most recent call last):
  File "c:\python35\lib\runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "c:\python35\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "c:\Python35\scripts\zope-testrunner.exe\__main__.py", line 7, in <module>
  File "c:\python35\lib\site-packages\zope\testrunner\__init__.py", line 31, in run
    warnings=warnings)
  File "c:\python35\lib\site-packages\zope\testrunner\__init__.py", line 49, in run_internal
    from zope.testrunner.runner import Runner
  File "c:\python35\lib\site-packages\zope\testrunner\runner.py", line 39, in <module>
    from zope.testrunner.options import get_options
  File "c:\python35\lib\site-packages\zope\testrunner\options.py", line 23, in <module>
    import pkg_resources
  File "c:\python35\lib\site-packages\pkg_resources\__init__.py", line 3017, in <module>
    @_call_aside
  File "c:\python35\lib\site-packages\pkg_resources\__init__.py", line 3003, in _call_aside
    f(*args, **kwargs)
  File "c:\python35\lib\site-packages\pkg_resources\__init__.py", line 3045, in _initialize_master_working_set
    dist.activate(replace=False)
  File "c:\python35\lib\site-packages\pkg_resources\__init__.py", line 2577, in activate
    declare_namespace(pkg)
  File "c:\python35\lib\site-packages\pkg_resources\__init__.py", line 2151, in declare_namespace
    _handle_ns(packageName, path_item)
  File "c:\python35\lib\site-packages\pkg_resources\__init__.py", line 2091, in _handle_ns
    _rebuild_mod_path(path, packageName, module)
  File "c:\python35\lib\site-packages\pkg_resources\__init__.py", line 2120, in _rebuild_mod_path
    orig_path.sort(key=position_in_sys_path)
AttributeError: '_NamespacePath' object has no attribute 'sort'