Merge pull request #55 from tumb1er/pyup-update-django-3.0.9-to-3.1

Update django to 3.1

Merge pull request #43 from VVyacheslav/django-testcase-support-and-f…

…ew-improvements

Added django TestCase support and few improvements.

Update README for Django-3.0 and JSONField

Merge pull request #23 from tumb1er/cleanup_mysqlclient_encoding_hand…

…ling

cleanup mysqlclient encoding handling after 1.4.4 release

Merge pull request #21 from tumb1er/fix_unicode_convertion

fix unicode convertion with new mysqliclient

Merge pull request #20 from tumb1er/pin_max_mysql_version

Pin mysqlclient max version to 1.4.2

Merge pull request #15 from tumb1er/django_22

Django-2.2 support

Merge pull request #14 from tumb1er/fix_empty_queryset_len

fix error while calling len of empty queryset

Merge pull request #11 from tumb1er/pyup-pin-pytz-2018.9

Pin pytz to latest version 2018.9

Merge pull request #7 from tumb1er/test_connection_encoding

Fix connection encoding