prepare for 1.21.4 update

patches/unapplied-api/0004-Purpur-config-files.patch

@@ -0,0 +1,29 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: William Blake Galbreath <Blake.Galbreath@GMail.com>
+Date: Tue, 18 Feb 2020 20:30:03 -0600
+Subject: [PATCH] Purpur config files
+
+
+diff --git a/src/main/java/org/bukkit/Server.java b/src/main/java/org/bukkit/Server.java
+index 0b78564256ebc647ebac402e549d86ab6e307c8d..625421183a3953d0d72d477e231f6831c87b7843 100644
+--- a/src/main/java/org/bukkit/Server.java
++++ b/src/main/java/org/bukkit/Server.java
+@@ -2283,6 +2283,18 @@ public interface Server extends PluginMessageRecipient, net.kyori.adventure.audi
+         }
+         // Paper end
+ 
++        // Purpur start
++        @NotNull
++        public org.bukkit.configuration.file.YamlConfiguration getPurpurConfig() {
++            throw new UnsupportedOperationException("Not supported yet.");
++        }
++
++        @NotNull
++        public java.util.Properties getServerProperties() {
++            throw new UnsupportedOperationException("Not supported yet.");
++        }
++        // Purpur end
++
+         /**
+          * Sends the component to the player
+          *