feat: Configure Java toolchain to use version 21 in build.gradle.kts

Author: TheMeinerLP

adapters/build.gradle.kts

@@ -9,4 +9,10 @@ dependencies {
 
 tasks.test {
     useJUnitPlatform()
+}
+
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(21))
+    }
 }

adapters/database/build.gradle.kts

@@ -16,4 +16,10 @@ dependencies {
 
     compileOnly(project(":api"))
 
+}
+
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(21))
+    }
 }

api/build.gradle.kts

@@ -20,4 +20,10 @@ tasks {
     test {
         useJUnitPlatform()
     }
+}
+
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(21))
+    }
 }

common/build.gradle.kts

@@ -27,4 +27,9 @@ dependencies {
 
 tasks.test {
     useJUnitPlatform()
+}
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(21))
+    }
 }

plugin/build.gradle.kts

@@ -44,11 +44,6 @@ java {
 }
 
 tasks {
-    compileJava {
-        options.encoding = "UTF-8"
-        options.release.set(21)
-    }
-
     runServer {
         minecraftVersion("1.21.4")
         jvmArgs("-Xmx4G", "-Dcom.mojang.eula.agree=true")