NumPy 1.21.4 release

1. bdb6701 TST: ignore pytest warning by mattip · 4 years, 9 months ago
2. cbd0897 BUG: fix a compile and a test warning by mattip · 5 years ago
3. 581f166 DEP: deprecate importing numpy/matrixlib.py by Seth Troisi · 6 years ago
4. 1279616 MAINT: Remove python3 deprecationwarnings in pytest.ini (#15399) by Seth Troisi · 6 years ago
5. ebd2def MAINT: Remove python2 array_getslice and array_setslice (#15263) by Seth Troisi · 6 years ago
6. d6903ec MAINT: Remove references to non-existent sys.exc_clear() by Jon Dufresne · 6 years ago
7. 7914ad1 TST: add value to pytest.ini for pytest6 compatibility by mattip · 6 years ago
8. 81fe94d TST: Register markers in conftest.py. by Charles Harris · 6 years ago
9. 96a40bd BLD: Make CI pass again with pytest 4.5 by Eric Wieser · 6 years ago
10. 2508610 TST, DOC: enable refguide_check by Tyler Reddy · 7 years ago
11. 3f111a4 BUG: Fix matrix PendingDeprecationWarning suppression for pytest 3.8+. by Charles Harris · 7 years ago
12. bb73a6a TST: Update pytest.ini and PytestTester by Charles Harris · 7 years ago
13. 6d7e702 MAINT: Update pytest.ini. by Charles Harris · 7 years ago
14. edb501d MAINT: Add a pytest.ini by xoviat · 8 years ago