Test against Python 3.11

.github/workflows/lint.yaml

@@ -10,7 +10,10 @@ jobs:
   lint:
     uses: iiasa/actions/.github/workflows/lint.yaml@main
     with:
-      # If the "Latest version testable on GitHub Actions" in pytest.yaml
-      # is not the latest 3.x stable version, adjust here to match:
-      python-version: "3.10"
-      type-hint-packages: pytest genno GitPython nbclient nbformat xarray sphinx
+      type-hint-packages: >-
+        genno
+        GitPython
+        nbclient
+        pytest
+        sphinx
+        xarray

.github/workflows/pytest.yaml

@@ -29,15 +29,8 @@ jobs:
         - "3.7"  # Earliest version supported by ixmp
         - "3.8"
         - "3.9"
-        - "3.10"  # Latest supported by ixmp
-
-        # For fresh releases and development versions of Python, compiled
-        # binary wheels are not available for some dependencies, e.g. llvmlite,
-        # numba, numpy, and/or pandas. Compiling these on the job runner
-        # requires a more elaborate build environment, currently out of scope
-        # for the ixmp project.
-        # - "3.11"  # Latest release; pending numba/numba#8304
-        # - "3.12.0-alpha.1"  # Development version
+        - "3.10"
+        - "3.11"  # Latest supported by ixmp
 
         # commented: force a specific version of pandas, for e.g. pre-release
         # testing