dynamically test with all supported Python versions using new fill: parameter

Author: zacharyburnett

.github/workflows/tests.yml

@@ -70,15 +70,12 @@ jobs:
         - linux: py311-oldestdeps-xdist-cov
           coverage: codecov
           pytest-results-summary: true
-        - linux: py311-xdist
-          posargs: -vv
-          pytest-results-summary: true
-        - linux: py312-xdist
-          pytest-results-summary: true
         # `tox` does not currently respect `requires-python` versions when creating testing environments;
         # if this breaks, add an upper pin to `requires-python` and revert this py3 to the latest working version
-        - linux: py313-cov-xdist
+        - linux: py3-cov-xdist
           coverage: codecov
           pytest-results-summary: true
-        - macos: py314-xdist
-          pytest-results-summary: true
+        - macos: py3-xdist
+      fill: true
+      fill_platforms: linux
+      fill_factors: xdist

.github/workflows/tests_extra.yml

@@ -61,15 +61,12 @@ jobs:
       envs: |
         - linux: check-docs-links
           python-version: '3.13'
-        - macos: py311-xdist
-          pytest-results-summary: true
-        - macos: py312-xdist
-          pytest-results-summary: true
-        - linux: py314-stdevdeps-xdist
-          pytest-results-summary: true
-        - macos: py313-stdevdeps-xdist
-          pytest-results-summary: true
-        - linux: py314-devdeps-xdist
-          pytest-results-summary: true
-        - macos: py313-devdeps-xdist
-          pytest-results-summary: true
+        # `tox` does not currently respect `requires-python` versions when creating testing environments;
+        # if this breaks, add an upper pin to `requires-python` and revert this py3 to the latest working version
+        - linux: py3-stdevdeps-xdist
+        - linux: py3-devdeps-xdist
+        - macos: py3-stdevdeps-xdist
+        - macos: py3-devdeps-xdist
+      fill: true
+      fill_platforms: macos
+      fill_factors: xdist