ci: Add Python 3.11 to testing (#112)

* Add Python 3.11 to testing in CI.
* Add Python 3.11 to PyPI trove classifiers metadata.
* Use Python 3.11 for CI workflows.

Author: matthewfeickert

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.8', '3.9', '3.10']
+        python-version: ['3.8', '3.9', '3.10', '3.11']
 
     steps:
     - name: Checkout code

.github/workflows/head-of-dependencies.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.10']
+        python-version: ['3.11']
 
     steps:
     - uses: actions/checkout@v3
@@ -47,7 +47,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.10']
+        python-version: ['3.11']
 
     steps:
     - uses: actions/checkout@v3
@@ -82,7 +82,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.10']
+        python-version: ['3.11']
 
     steps:
     - uses: actions/checkout@v3
@@ -117,7 +117,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.10']
+        python-version: ['3.11']
 
     steps:
     - uses: actions/checkout@v3

setup.cfg

@@ -19,6 +19,7 @@ classifiers =
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
     Programming Language :: Python :: Implementation :: CPython
     Topic :: Scientific/Engineering
     Topic :: Scientific/Engineering :: Physics