freezegun == 0.3.11
pytest == 4.4.0
tox == 3.5.3

freezegun == 0.3.12
pytest == 4.6.2
tox == 3.12.1

Upgrade test dependencies freezegun v0.3.11 to v0.3.12, pytest v4.4.0 to v4.6.2, tox v3.5.3 to v3.12.1
Upgrade test dependencies freezegun v0.3.11 to v0.3.12, pytest v4.4.0 to v4.6.2, tox v3.5.3 to v3.12.1
