GA build pip install tessagon

Author: pv

.github/workflows/build.yml

@@ -65,6 +65,9 @@ jobs:
       - name: Install cibuildwheel
         run: pipx install cibuildwheel==2.23.1
 
+      - name: Install tessagon
+        run: pipx install tessagon
+
       - name: Build wheels
         run: cibuildwheel --output-dir wheelhouse .