New chat events for better Adventure support (#5289)

Bump Adventure to 4.6.0

fixes #5216
fixes #5261
fixes #5287

Spigot-API-Patches/0231-Add-getOfflinePlayerIfCached-String.patch

@@ -0,0 +1,68 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: oxygencraft <21054297+oxygencraft@users.noreply.github.com>
+Date: Sun, 25 Oct 2020 18:35:58 +1100
+Subject: [PATCH] Add getOfflinePlayerIfCached(String)
+
+
+diff --git a/src/main/java/org/bukkit/Bukkit.java b/src/main/java/org/bukkit/Bukkit.java
+index 6228d7eca85fba52296c8d63d32804f32af1b421..68101a322ffab8ec28843386b79b8079576fa720 100644
+--- a/src/main/java/org/bukkit/Bukkit.java
++++ b/src/main/java/org/bukkit/Bukkit.java
+@@ -950,6 +950,27 @@ public final class Bukkit {
+         return server.getOfflinePlayer(name);
+     }
+ 
++    // Paper start
++    /**
++     * Gets the player by the given name, regardless if they are offline or
++     * online.
++     * <p>
++     * This will not make a web request to get the UUID for the given name,
++     * thus this method will not block. However this method will return
++     * {@code null} if the player is not cached.
++     * </p>
++     *
++     * @param name the name of the player to retrieve
++     * @return an offline player if cached, {@code null} otherwise
++     * @see #getOfflinePlayer(String)
++     * @see #getOfflinePlayer(java.util.UUID)
++     */
++    @Nullable
++    public static OfflinePlayer getOfflinePlayerIfCached(@NotNull String name) {
++        return server.getOfflinePlayerIfCached(name);
++    }
++    // Paper end
++
+     /**
+      * Gets the player by the given UUID, regardless if they are offline or
+      * online.
+diff --git a/src/main/java/org/bukkit/Server.java b/src/main/java/org/bukkit/Server.java
+index 6237578b373002c009efde4fb4c1864f0bf4f19e..a79fa08b9e6fb924b2da933eb6e4b365d14d938d 100644
+--- a/src/main/java/org/bukkit/Server.java
++++ b/src/main/java/org/bukkit/Server.java
+@@ -797,6 +797,25 @@ public interface Server extends PluginMessageRecipient, net.kyori.adventure.audi
+     @NotNull
+     public OfflinePlayer getOfflinePlayer(@NotNull String name);
+ 
++    // Paper start
++    /**
++     * Gets the player by the given name, regardless if they are offline or
++     * online.
++     * <p>
++     * This will not make a web request to get the UUID for the given name,
++     * thus this method will not block. However this method will return
++     * {@code null} if the player is not cached.
++     * </p>
++     *
++     * @param name the name of the player to retrieve
++     * @return an offline player if cached, {@code null} otherwise
++     * @see #getOfflinePlayer(String)
++     * @see #getOfflinePlayer(java.util.UUID)
++     */
++    @Nullable
++    public OfflinePlayer getOfflinePlayerIfCached(@NotNull String name);
++    // Paper end
++
+     /**
+      * Gets the player by the given UUID, regardless if they are offline or
+      * online.