Add Java 21 build (#24)

Update to checkout@v4
update testing dependencies

.github/workflows/maven-build.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        java: [11, 17]
+        java: [11, 17, 21]
         os: [ubuntu-latest]
         distribution: [temurin]
 

.github/workflows/maven-deploy.yml

@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Configure GIT
         run: |

.github/workflows/release-from-tag.yml

@@ -12,7 +12,7 @@ jobs:
     permissions:
       contents: write
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: ncipollo/release-action@v1
       with:
         body: 'Changes: https://wcm.io/handler/media/changes-report.html'

pom.xml

@@ -25,7 +25,7 @@
   <parent>
     <groupId>io.wcm</groupId>
     <artifactId>io.wcm.parent_toplevel</artifactId>
-    <version>2.2.2</version>
+    <version>2.2.3-SNAPSHOT</version>
     <relativePath/>
   </parent>
 
@@ -138,7 +138,7 @@
     <dependency>
       <groupId>io.wcm</groupId>
       <artifactId>io.wcm.testing.aem-mock.junit5</artifactId>
-      <version>5.4.0</version>
+      <version>5.4.1-SNAPSHOT</version>
       <scope>test</scope>
     </dependency>
     <dependency>