It just occurred to me that lp-signing uses Storm and is still deployed on bionic according to its Mojo spec, so Python 3.6. Maybe we should retain 3.6 support for now? That would still allow dropping the awkward `tox.ini` stuff for 3.5, and there's otherwise no apparent simplification to be gained by dropping 3.6 (other than speeding up the test suite).
It just occurred to me that lp-signing uses Storm and is still deployed on bionic according to its Mojo spec, so Python 3.6. Maybe we should retain 3.6 support for now? That would still allow dropping the awkward `tox.ini` stuff for 3.5, and there's otherwise no apparent simplification to be gained by dropping 3.6 (other than speeding up the test suite).