* Configure tox environments for install, dev install and docs build
* Configure Travis to run tox
* Use 3.5.1 since it's our minimum supported version
* Bump lower travis build version to 3.5.2
Turns out a dependency is incompatible with 3.5.1.
* Modify Travis config to install from pipenv
* Try without skipping the lock
* Try without pip cache
* D the dev install with pipenv
* See if adding the pip cache back in breaks
* Remove the development installation
It doesn't really make any sense considering we already should be installed in develop mode, as does Travis.
* Oops, tox should go under dev packages
* Do black --check with tox
* Uncache pip again...
* Try a build matrix, and try ignoring virtualenvs
* Activate pipenv shell on travis
* Try installing prereleases
* Try the build matrix like this
* Try exclusion
* Upgrade pip
* Try this environment marker
* Back to stages...
* Try run over shell
* Try skipping the lock again
* This'll be faster but probably ignore 3.5
Because Travis
* Just manually list sources for black to check
* Magic?
* What if I told you...
That this worked perfectly on Tobotimus/Red-DiscordBot@test_travis_matrix
* It couldn't possibly be this easy
* Let's add some comments to be nice
* Let's change back to trusty just in case the stages fuck up
* Add another comment because why not
* Let's try caching pip one more time
* We don't need to whitelist these
