Upgrade sqlite on travis (#55)
Upgrade sqlite on travis (#55)

* Adds sqlite3 from travis ppa

* Move all tests to xenial

Trusty is deprecated April 2019 and its version of SQLITE is deprecated
see https://code.djangoproject.com/ticket/30055

* Install sqlite 3.22.0.0

* Print sqlite version

* Purge sqlite3

* Try removing python-sqlite too

* Try installing from backport ppa

* Assume yes

* Adds comment about django2.2 and sqlite

bioinformatics-ua/django-userena,bioinformatics-ua/django-userena,bioinformatics-ua/django-userena