add moodle branches and mod dependency

.github/workflows/moodle-ci.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         php: ['7.4']
-        moodle-branch: ['MOODLE_311_STABLE']
+        moodle-branch: ['MOODLE_39_STABLE', 'MOODLE_310_STABLE', 'MOODLE_311_STABLE']
         database: ['pgsql']
 
     steps:
@@ -54,6 +54,7 @@ jobs:
       - name: Install moodle-plugin-ci
         run: |
           moodle-plugin-ci add-plugin Opencast-Moodle/moodle-tool_opencast
+          moodle-plugin-ci add-plugin Opencast-Moodle/moodle-mod_opencast
           moodle-plugin-ci install --plugin ./plugin --db-host=127.0.0.1 --no-init
         env:
           DB: ${{ matrix.database }}