[FEATURE] Use Java 21

.github/workflows/push.yml

@@ -16,10 +16,10 @@ jobs:
           path: ~/.gradle/caches
           key: gravit-${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}-launcher
 
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v1
         with:
-          java-version: 17
+          java-version: 21
 
       - name: Grant execute permission for gradlew
         run: chmod +x gradlew

LaunchServer/build.gradle

@@ -15,8 +15,8 @@
     }
 }
 
-sourceCompatibility = '17'
-targetCompatibility = '17'
+sourceCompatibility = '21'
+targetCompatibility = '21'
 
 configurations {
     compileOnlyA

modules

@@ -1 +1 @@
-Subproject commit 0d4344a435e6226851c2de0c6a656decf438b1d8
+Subproject commit c1e2a998e06e1a2f4e69183acbc1cfc3b3cd000d