Updated Guice to 6.0.0 and manually include updated ASM (#1016)

proxy/build.gradle.kts

@@ -114,6 +114,7 @@ dependencies {
     implementation(libs.nightconfig)
     implementation(libs.bstats)
     implementation(libs.lmbda)
+    implementation(libs.asm)
     implementation(libs.bundles.flare)
     compileOnly(libs.spotbugs.annotations)
     testImplementation(libs.mockito)

proxy/src/main/java/com/velocitypowered/proxy/event/VelocityEventManager.java

@@ -306,8 +306,7 @@ public class VelocityEventManager implements EventManager {
         if (returnType != void.class && continuationType == Continuation.class) {
           errors.add("method return type must be void if a continuation parameter is provided");
         } else if (returnType != void.class && returnType != EventTask.class) {
-          errors.add("method return type must be void, AsyncTask, "
-              + "AsyncTask.Basic or AsyncTask.WithContinuation");
+          errors.add("method return type must be void or EventTask");
         }
       }
       final short order = (short) subscribe.order().ordinal();