MAINT: PR 15088 revisions

* add Isuru Fernando to author list, for assistance in
providing M1 support

* adjust the 1.7.3 release notes summary to remove any
mention of test skips and to note that MacOS version 12.0
is required for the arm64 wheels.

* skip a `qmc` test when it is executed with a version
of NumPy < 1.17, because default_rng not available

doc/release/1.7.3-notes.rst

@@ -5,8 +5,9 @@ SciPy 1.7.3 Release Notes
 .. contents::
 
 SciPy 1.7.3 is a bug-fix release that provides binary wheels
-for MacOS arm64 with Python 3.8, 3.9, and 3.10. Note that a small
-number of test failures have been skipped for these new wheels.
+for MacOS arm64 with Python 3.8, 3.9, and 3.10. The MacOS arm64 wheels
+are only available for MacOS version 12.0 and greater, as explained
+in Issue 14688, linked below.
 
 Authors
 =======
@@ -16,8 +17,9 @@ Authors
 * Tyler Reddy
 * Pamphile Roy
 * Olivier Grisel
+* Isuru Fernando
 
-A total of 5 people contributed to this release.
+A total of 6 people contributed to this release.
 People with a "+" by their names contributed a patch for the first time.
 This list of names is automatically generated, and may not be fully complete.
 

scipy/stats/tests/test_qmc.py

@@ -12,6 +12,7 @@
 from scipy.stats import qmc
 from scipy.stats._qmc import (van_der_corput, n_primes, primes_from_2_to,
                               update_discrepancy, QMCEngine)
+from scipy._lib._pep440 import Version
 
 
 class TestUtils:
@@ -177,6 +178,8 @@ def test_discrepancy_parallel(self, monkeypatch):
         with pytest.raises(ValueError, match="Invalid number of workers..."):
             qmc.discrepancy(sample, workers=-2)
 
+    @pytest.mark.skipif(Version(np.__version__) < Version('1.17'),
+                        reason='default_rng not available for numpy, < 1.17')
     def test_update_discrepancy(self):
         # From Fang et al. Design and modeling for computer experiments, 2006
         space_1 = np.array([[1, 3], [2, 6], [3, 2], [4, 5], [5, 1], [6, 4]])