Travis CI recommends removing the sudo tag
So this change completely fucks the 3.8 tests and the solution is to mark it as "allow failures"? Nope. OK, I owe you an apology actually, as the psycopg2 driver installation seems to be failing on 3.8 regardless of any other changes. Sorry about that.
[Travis are now recommending removing the __sudo__ tag](https://blog.travis-ci.com/2018-11-19-required-linux-infrastructure-migration).

"_If you currently specify __sudo: false__ in your __.travis.yml__, we recommend removing that configuration_"