NumPy 1.16.4 release

1. 9d4feed TST: Register markers in conftest.py. by Charles Harris · 7 years ago
2. 5328ea6 BLD: Make CI pass again with pytest 4.5 by Eric Wieser · 7 years ago
3. 3f111a4 BUG: Fix matrix PendingDeprecationWarning suppression for pytest 3.8+. by Charles Harris · 7 years ago
4. bb73a6a TST: Update pytest.ini and PytestTester by Charles Harris · 8 years ago
5. 6d7e702 MAINT: Update pytest.ini. by Charles Harris · 8 years ago
6. edb501d MAINT: Add a pytest.ini by xoviat · 8 years ago