Add Spigot 1.21 world adapter

bootstrap/spigot/src/main/java/org/geysermc/geyser/platform/spigot/GeyserSpigotPlugin.java

@@ -251,6 +251,7 @@ public class GeyserSpigotPlugin extends JavaPlugin implements GeyserBootstrap {
                     SpigotAdapters.registerWorldAdapter(nmsVersion);
                     geyserLogger.debug("Using spigot NMS adapter for nms version: " + nmsVersion);
                 } catch (Exception e) { // Likely running on Paper 1.20.5+
+                    geyserLogger.debug("Unable to find spigot world manager: " + e.getMessage());
                     //noinspection deprecation
                     int protocolVersion = Bukkit.getUnsafe().getProtocolVersion();
                     PaperAdapters.registerClosestWorldAdapter(protocolVersion);

gradle/libs.versions.toml

@@ -23,7 +23,7 @@ jline = "3.21.0"
 terminalconsoleappender = "1.2.0"
 folia = "1.19.4-R0.1-SNAPSHOT"
 viaversion = "4.9.2"
-adapters = "1.12-SNAPSHOT"
+adapters = "1.13-SNAPSHOT"
 commodore = "2.2"
 bungeecord = "a7c6ede"
 velocity = "3.3.0-SNAPSHOT"