drop lavalink v3 support

Author: topi314

README.md

@@ -99,23 +99,10 @@ YoutubeAudioSourceManager youtube = new YoutubeAudioSourceManager(/*allowSearch:
 ```
 
 ## plugin
-This module serves as the plugin for use with [Lavalink](https://github.com/lavalink-devs/Lavalink).
+This module serves as the plugin for use with [Lavalink v4](https://github.com/lavalink-devs/Lavalink).
 
 To use this plugin with Lavalink, you must declare the dependency.
 
-<details>
-<summary>Using with Lavalink v3:</summary>
-
-```yaml
-lavalink:
-  plugins:
-    # Replace VERSION with the current version as shown by the Releases tab or a long commit hash for snapshots.
-    - dependency: "dev.lavalink.youtube:youtube-plugin:VERSION"
-      repository: "https://maven.lavalink.dev/releases" # use https://maven.lavalink.dev/snapshots if you want to use a snapshot version.
-```
-
-</details>
-
 <details>
 <summary>Using with Lavalink v4:</summary>
 

plugin/build.gradle.kts

@@ -32,8 +32,8 @@ dependencies {
 }
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_11
-    targetCompatibility = JavaVersion.VERSION_11
+    sourceCompatibility = JavaVersion.VERSION_17
+    targetCompatibility = JavaVersion.VERSION_17
 }
 
 mavenPublishing {

settings.gradle.kts

@@ -15,7 +15,7 @@ dependencyResolutionManagement {
             library("lavaplayer-v1", "dev.arbjerg", "lavaplayer").versionRef("lavaplayer-v1")
             library("lavaplayer-v2", "dev.arbjerg", "lavaplayer").versionRef("lavaplayer-v2")
 
-            version("lavalink", "3.7.11")
+            version("lavalink", "4.0.7")
             library("lavalink-server", "dev.arbjerg.lavalink", "Lavalink-Server").versionRef("lavalink")
             library("lavaplayer-ext-youtube-rotator", "dev.arbjerg", "lavaplayer-ext-youtube-rotator").versionRef("lavaplayer-v1")