feature: Support JDK21

.github/workflows/CI.yml

@@ -27,6 +27,24 @@ jobs:
       - uses: actions/checkout@v2
       - name: jcheckstyle
         run: ./sbt jcheckStyle
+  test_jdk21:
+    name: Test JDK21
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v3
+        with:
+          distribution: 'zulu'
+          java-version: '21'
+      - uses: actions/cache@v2
+        with:
+          path: ~/.cache
+          key: ${{ runner.os }}-jdk21-${{ hashFiles('**/*.sbt') }}
+          restore-keys: ${{ runner.os }}-jdk21-
+      - name: Test
+        run: ./sbt test
+      - name: Universal Buffer Test
+        run: ./sbt test -J-Dmsgpack.universal-buffer=true
   test_jdk17:
     name: Test JDK17
     runs-on: ubuntu-latest
@@ -39,7 +57,7 @@ jobs:
       - uses: actions/cache@v2
         with:
           path: ~/.cache
-          key: ${{ runner.os }}-jdk11-${{ hashFiles('**/*.sbt') }}
+          key: ${{ runner.os }}-jdk17-${{ hashFiles('**/*.sbt') }}
           restore-keys: ${{ runner.os }}-jdk17-
       - name: Test
         run: ./sbt test