BUG: Fix install in older Python by changing v2 to confv2

.github/workflows/publish.yml

@@ -18,7 +18,7 @@ jobs:
         fetch-depth: 0
     - uses: actions/setup-python@v4
       with:
-        python-version: "3.11"
+        python-version: "3.8"
 
     - name: Install build dependencies
       run: python -m pip install pip build "twine>=3.3" -U

CHANGES.rst

@@ -1,8 +1,11 @@
 Changes in sphinx-astropy
 =========================
 
-2.0 (unreleased)
-----------------
+1.9.1 (2023-06-07)
+------------------
+
+- Renamed ``[v2]`` optional dependencies key to ``[confv2]``
+  to avoid triggering build error in Python 3.10 or earlier. [#63]
 
 1.9 (2023-06-06)
 ----------------

README.rst

@@ -50,13 +50,13 @@ Installing **sphinx-astropy** will automatically install (if not already present
 
 * `pytest-doctestplus <https://github.com/astropy/pytest-doctestplus/>`_ - providing the 'doctestplus' extension to skip code snippets in narrative documentation.
 
-pydata-sphinx-theme (v2)
-^^^^^^^^^^^^^^^^^^^^^^^^
+pydata-sphinx-theme (confv2)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 To use the new `pydata-sphinx-theme` with `sphinx_astropy.conf.v2`, you have to install
-the optional `[v2]` dependencies::
+the optional `[confv2]` dependencies::
 
-    pip install sphinx-astropy[v2]
+    pip install sphinx-astropy[confv2]
 
 That would pull in the following as well:
 

setup.cfg

@@ -30,7 +30,7 @@ install_requires =
     pytest-doctestplus>=0.11
 
 [options.extras_require]
-v2 =
+confv2 =
     pydata-sphinx-theme
     sphinx-copybutton
 all = astropy

tox.ini

@@ -12,7 +12,7 @@ changedir = .tmp/{envname}
 description = run tests
 extras =
     tests
-    v2deps: v2
+    v2deps: confv2
 deps =
     sphinx30: sphinx==3.0.*
     sphinx30: docutils==0.17.*