Remove support for Python 3.4
I would like to remove support for Python 3.4 in Mailman 3.2 Core. It's possible that nothing actively needs to be done, but I won't worry about using any Python 3.5+ features or stdlib, and I reserve the right to modernize code opportunistically. Most notably, I may adopt async
and await
keywords as I add more asyncio support to Core, and I do not want to use @async.coroutine
decorators!
I can't go as far as require Python 3.6 yet, but f-strings sure make that enticing. Maybe for Core 3.3.