[Chat] Added support for the WelcomeEvent

Author: MJRLegends

src/main/java/com/mixer/api/resource/chat/AbstractChatEvent.java

@@ -20,7 +20,8 @@ public static enum EventType {
         @SerializedName("PollEnd") POLL_END (PollEndEvent.class),
         @SerializedName("Stats") STATS (StatusEvent.class),
         @SerializedName("UserJoin") USER_JOIN (UserJoinEvent.class),
-        @SerializedName("UserLeave") USER_LEAVE (UserLeaveEvent.class);
+        @SerializedName("UserLeave") USER_LEAVE (UserLeaveEvent.class),
+        @SerializedName("WelcomeEvent") WELCOME (WelcomeEvent.class);
 
         private final Class<? extends AbstractChatEvent> correspondingClass;
 

src/main/java/com/mixer/api/resource/chat/events/WelcomeEvent.java

@@ -0,0 +1,10 @@
+package com.mixer.api.resource.chat.events;
+
+import com.mixer.api.resource.chat.AbstractChatEvent;
+import com.mixer.api.resource.chat.events.data.WelcomeMessageData;
+
+public class WelcomeEvent extends AbstractChatEvent<WelcomeMessageData> {
+	public WelcomeEvent() {
+		this.event = EventType.WELCOME;
+	}
+}

src/main/java/com/mixer/api/resource/chat/events/data/WelcomeMessageData.java

@@ -0,0 +1,7 @@
+package com.mixer.api.resource.chat.events.data;
+
+import com.mixer.api.resource.chat.AbstractChatEvent;
+
+public class WelcomeMessageData extends AbstractChatEvent.EventData {
+	public String server;
+}