Test with matrix.

.github/workflows/ci-ubuntu.yml

@@ -13,15 +13,14 @@ on:
     # * is a special character in YAML so you have to quote this string
     # run at 02:01 on the 10th of each month
     - cron:  '1 2 10 * *'     
-env:
-  EASTEREIG_USE_FPOLY: True
 
 jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11'] 
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+        EASTEREIG_USE_FPOLY: ['True', 'False']
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
     # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
@@ -50,7 +49,7 @@ jobs:
     - name: Run test without petsc
       run: |
         python -m eastereig
-        python -c "from eastereig.fpoly import _fpolyval"
+        python -c "from eastereig.fpoly import polyvalnd"
 #    # Since pip 23.1 trouble with pip installation of petsc4py        
 #    - name: Install petsc and their dependencies (support for parallel matrices)
 #      run: |