Update to Minecraft 1.21

By: md_5 <git@md-5.net>

paper-server/nms-patches/net/minecraft/server/dedicated/DedicatedServerProperties.patch

@@ -17,7 +17,7 @@
      public final boolean onlineMode = this.get("online-mode", true);
      public final boolean preventProxyConnections = this.get("prevent-proxy-connections", false);
      public final String serverIp = this.get("server-ip", "");
-@@ -104,8 +109,10 @@
+@@ -105,8 +110,10 @@
      public final WorldOptions worldOptions;
      public boolean acceptsTransfers;
  
@@ -30,7 +30,7 @@
          this.difficulty = (EnumDifficulty) this.get("difficulty", dispatchNumberOrString(EnumDifficulty::byId, EnumDifficulty::byName), EnumDifficulty::getKey, EnumDifficulty.EASY);
          this.gamemode = (EnumGamemode) this.get("gamemode", dispatchNumberOrString(EnumGamemode::byId, EnumGamemode::byName), EnumGamemode::getName, EnumGamemode.SURVIVAL);
          this.levelName = this.get("level-name", "world");
-@@ -164,13 +171,15 @@
+@@ -165,13 +172,15 @@
          this.initialDataPackConfiguration = getDatapackConfig(this.get("initial-enabled-packs", String.join(",", WorldDataConfiguration.DEFAULT.dataPacks().getEnabled())), this.get("initial-disabled-packs", String.join(",", WorldDataConfiguration.DEFAULT.dataPacks().getDisabled())));
      }
  
@@ -50,7 +50,7 @@
      }
  
      @Nullable
-@@ -251,10 +260,10 @@
+@@ -252,10 +261,10 @@
              }).orElseThrow(() -> {
                  return new IllegalStateException("Invalid datapack contents: can't find default preset");
              });
@@ -63,7 +63,7 @@
              });
  
              Objects.requireNonNull(iregistry);
-@@ -266,7 +275,7 @@
+@@ -267,7 +276,7 @@
  
              if (holder.is(WorldPresets.FLAT)) {
                  RegistryOps<JsonElement> registryops = iregistrycustom.createSerializationContext(JsonOps.INSTANCE);