Move GH actions to J21

Co-authored-by: Kichura <68134602+kichura@users.noreply.github.com>

.github/workflows/build.yml

@@ -9,11 +9,11 @@ jobs:
         uses: actions/checkout@v4
       - name: Validate Gradle Wrapper
         uses: gradle/actions/wrapper-validation@v3
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
          distribution: 'temurin'
-         java-version: 17
+         java-version: 21
          check-latest: true
       - name: Cache Dependencies
         uses: actions/cache@v4

.github/workflows/publish.yml

@@ -10,11 +10,11 @@ jobs:
         uses: actions/checkout@v4
       - name: Validate Gradle Wrapper
         uses: gradle/actions/wrapper-validation@v3
-      - name: Set up JDK 17
+      - name: Set up JDK 21
         uses: actions/setup-java@v4
         with:
          distribution: 'temurin'
-         java-version: 17
+         java-version: 21
          check-latest: true
       - name: Build and Publish
         env:

build.gradle

@@ -43,7 +43,7 @@ allprojects {
     java {
         toolchain {
             // lwjgl2 works with Adoptium
-            languageVersion = JavaLanguageVersion.of(17)
+            languageVersion = JavaLanguageVersion.of(21)
             vendor = JvmVendorSpec.ADOPTIUM
         }
         withSourcesJar()
@@ -166,7 +166,7 @@ processResources {
 List<String> mcReleases = Arrays.stream(rootProject.publish_mc_versions.toString().split(","))
         .map({ it -> it.trim() })
         .collect(Collectors.toList())
-List<String> javaVersions = IntStream.rangeClosed(8, 17)
+List<String> javaVersions = IntStream.rangeClosed(8, 21)
         .mapToObj { n -> (String) "Java $n" }
         .collect(Collectors.toList())
 String changelogMsg = "A changelog can be found at https://github.com/ViaVersion/ViaFabric/commits"

jitpack.yml

@@ -1,7 +1,7 @@
-# Deploys the latest stable JDK 17 available and sets it to default without having to manually specify it here,
+# Deploys the latest stable JDK 21 available and sets it to default without having to manually specify it here,
 # Which includes using temurin as the distribution.
 before_install:
   - curl -s "https://get.sdkman.io" | bash
   - source ~/.sdkman/bin/sdkman-init.sh
-  - sdk install java 17.0.10-tem
-  - sdk use java 17.0.10-tem
+  - sdk install java 21.0.2-tem
+  - sdk use java 21.0.2-tem