Add python 3.12 devdeps testing (#886)

.github/workflows/tests_devdeps.yml

@@ -65,3 +65,5 @@ jobs:
           pytest-results-summary: true
         - macos: py3-devdeps-webbpsf
           pytest-results-summary: true
+        - linux: py312-devdeps
+          python_version: "3.12-dev"

requirements-dev-thirdparty.txt

@@ -5,9 +5,13 @@ git+https://github.com/asdf-format/asdf-transform-schemas.git
 git+https://github.com/asdf-format/asdf-coordinates-schemas.git
 git+https://github.com/asdf-format/asdf-wcs-schemas.git
 
+# Use current dev version of deepdiff
+git+https://github.com/seperman/deepdiff.git@dev
+
 # Use weekly astropy dev build
 git+https://github.com/astropy/asdf-astropy.git
 --extra-index-url https://pypi.anaconda.org/astropy/simple astropy --pre
+--extra-index-url https://pypi.anaconda.org/liberfa/simple pyerfa --pre
 git+https://github.com/astropy/photutils.git
 
 # Use Bi-weekly numpy/scipy dev builds

tox.ini

@@ -67,7 +67,7 @@ commands_pre =
     oldestdeps: minimum_dependencies romancal --filename requirements-min.txt
     oldestdeps: pip install -r requirements-min.txt
     stdevdeps: pip install -r requirements-dev-st.txt -U --upgrade-strategy eager
-    devdeps: pip install -r requirements-dev-thirdparty.txt -r requirements-dev-st.txt -U --upgrade-strategy eager
+    devdeps: pip install -I -r requirements-dev-thirdparty.txt -r requirements-dev-st.txt -U --upgrade-strategy eager
     sdpdeps: pip install -r requirements-sdp.txt
     pip list
 commands =