- Update to version 3.0.1
* Fix failure to import bug when on Python 3.6.7 and 3.7.1
* Fixed a number of failure to import bugs around finding fonts
* Fix Qt4 backend
* Fix bug on OSX that recursively searched current directory for fonts
* Fix bouncing-rocket on OSX when doing backend fallback and not
selecting OSX
* Temporarily restore several private APIs to unbreak cartopy
* Make pyplot more tolerant of varying signatures in 3rd-party
sub-classe
* Improve datetime64 unit handling
* Fixed several poor interactions with tight_layout