Updated Upstream (Paper)

Upstream has released updates that appear to apply and compile correctly

patches/api/0004-Purpur-client-support.patch

@@ -0,0 +1,24 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Fredthedoggy <45927799+fredthedoggy@users.noreply.github.com>
+Date: Thu, 19 Aug 2021 20:04:18 -0400
+Subject: [PATCH] Purpur client support
+
+
+diff --git a/src/main/java/org/bukkit/entity/Player.java b/src/main/java/org/bukkit/entity/Player.java
+index 5084ef3cb0884fb5c170859bc7be57a9fcba0a3c..ef68c7ee481eb7f50f2561a211b4add801e5e8dd 100644
+--- a/src/main/java/org/bukkit/entity/Player.java
++++ b/src/main/java/org/bukkit/entity/Player.java
+@@ -2299,4 +2299,13 @@ public interface Player extends HumanEntity, Conversable, OfflinePlayer, PluginM
+     @Override
+     Spigot spigot();
+     // Spigot end
++
++    // Purpur start
++    /**
++     * Allows you to get if player uses Purpur Client
++     *
++     * @return True if Player uses Purpur Client
++     */
++    public boolean usesPurpurClient();
++    // Purpur end
+ }