Update Plugin CI test matrix

Author: FMCorz

.github/workflows/ci.yml

@@ -8,30 +8,19 @@ jobs:
 
     services:
       postgres:
-        image: postgres:13
+        image: postgres:14
         env:
           POSTGRES_USER: 'postgres'
           POSTGRES_HOST_AUTH_METHOD: 'trust'
         ports:
           - 5432:5432
         options: --health-cmd pg_isready --health-interval 10s --health-timeout 5s --health-retries 3
 
-      mariadb:
-        image: mariadb:10.6
-        env:
-          MYSQL_USER: 'root'
-          MYSQL_ALLOW_EMPTY_PASSWORD: 'true'
-          MYSQL_CHARACTER_SET_SERVER: 'utf8mb4'
-          MYSQL_COLLATION_SERVER: 'utf8mb4_unicode_ci'
-        ports:
-          - 3306:3306
-        options: --health-cmd="mysqladmin ping" --health-interval 10s --health-timeout 5s --health-retries 3
-
     strategy:
       fail-fast: false
       matrix:
         php: ['8.1', '8.2', '8.3']
-        moodle-branch: ['MOODLE_401_STABLE', 'MOODLE_404_STABLE', 'MOODLE_405_STABLE']
+        moodle-branch: ['MOODLE_401_STABLE', 'MOODLE_404_STABLE', 'MOODLE_405_STABLE', 'v5.0.0-rc2']
         database: [pgsql]
         include:
           # PHP 7.4, solely on Moodle 4.1.
@@ -44,11 +33,18 @@ jobs:
             database: pgsql
             php: 8.0
 
+          # PHP 8.4, with Moodle 5.0.
+          - moodle-branch: v5.0.0-rc2
+            database: pgsql
+            php: 8.4
+
         exclude:
           - moodle-branch: MOODLE_401_STABLE
             php: 8.2
           - moodle-branch: MOODLE_401_STABLE
             php: 8.3
+          - moodle-branch: v5.0.0-rc2
+            php: 8.1
 
     steps:
       - name: Check out repository code