* Drop setup.py test support.

It's fragile and relies on eggs. While our downstream redistributors don't love this (sorry!), it seems like the right tradeoff.

* Remove unused

* Added a changelog entry

* typo

* line length

It already defaults to x-rst, but this silences a warning

* allow bytearrays for key/iv for symmetric encryption

* bump pypy/cffi requirements

* update docs, fix some tests

* old openssl is naught but pain

* revert a typo

* use trusty for old pypy

* better error msg again

* restore match

* remove idna as a primary dependency

* empty commit

* dynamodb test fix (thanks to Matt Bullock)

* review feedback

* ci is suffering again, is it the new pytest or hypothesis?

* now try 3.79.2 hypothesis

* it's a blacklist party

* update pytest config

pytest 3.8.0 was just released and officially deprecates some of the way
we do pytest marks. They introduced a new way to do this in 3.6 so this
PR switches to that mechanism and updates our minimum pytest requirement

* update the stubs

* also update wycheproof test config to remove deprecated paths

* don't need this any more