Build against Paper 26.1.1 to ensure compatibility

- Switch to VaultAPI 1.7 as there's really no difference and the previous repo is down
- Compile with Java 25
- Downgrade to Java 21

Probably we will be discontinuing 11 and 16 downgrades as, according to bstats, amount of servers using it is really low.

Author: Krakenied

build.gradle.kts

@@ -1,5 +1,6 @@
 import xyz.wagyourtail.jvmdg.gradle.task.DowngradeJar
 import xyz.wagyourtail.jvmdg.gradle.task.ShadeJar
+import org.gradle.jvm.toolchain.JavaLanguageVersion
 
 plugins {
     java
@@ -15,7 +16,7 @@ allprojects {
 
     java {
         toolchain {
-            languageVersion = JavaLanguageVersion.of(21)
+            languageVersion = JavaLanguageVersion.of(25)
         }
     }
 }
@@ -24,7 +25,7 @@ subprojects {
     tasks.withType<JavaCompile> {
         options.compilerArgs = listOf("-Xlint:deprecation", "-Xlint:unchecked")
         options.encoding = Charsets.UTF_8.name()
-        options.release = 21
+        options.release = 25
     }
 
     tasks.withType<Javadoc> {
@@ -89,7 +90,10 @@ val javaVersions = listOf(
     JavaVersion.VERSION_16,
 
     // from 1.18 to 1.20.4
-    JavaVersion.VERSION_17
+    JavaVersion.VERSION_17,
+
+    // from 1.20.5 to 1.21.11
+    JavaVersion.VERSION_21
 )
 
 for (javaVersion in javaVersions) {

bukkit/build.gradle.kts

@@ -71,7 +71,7 @@ dependencies {
     compileOnlyProject(":common")
 
     // Paper
-    compileOnlyServer("io.papermc.paper:paper-api:1.21.11-pre3-R0.1-SNAPSHOT")
+    compileOnlyServer("io.papermc.paper:paper-api:26.1.1.build.29-alpha")
 
     // ASkyBlock
     compileOnlyPlugin("com.wasteofplastic:askyblock:3.0.9.4")
@@ -134,7 +134,7 @@ dependencies {
     // uSkyBlock TODO fix whenever repo is up
     //compileOnlyPlugin("ovh.uskyblock:uSkyBlock-API:2.8.9")
     // Vault
-    compileOnlyPlugin("com.github.MilkBowl:VaultAPI:1.7.1")
+    compileOnlyPlugin("com.github.MilkBowl:VaultAPI:1.7")
     // VotingPlugin
     compileOnlyPlugin("com.bencodez:votingplugin:6.18.4")
     // WildStacker