v2.0.0

Drop support for Python 3.4 and 3.5.

A setting is available: template_extensions lets you set the file extensions that will be considered when looking for unused templates (requested in issue 60).

Fix an issue on Windows where file names were being compared case-sensitively, causing templates to be missed (issue 46).

Fix an issue (issue 63) where tag libraries can't be found if imported during test collection. Thanks to Daniel Izquierdo for the fix.