Change default encoding to UTF-8

Fixes #19

Author: MinnDevelopment

src/main/java/club/minnced/discord/rpc/DiscordRichPresence.java

@@ -42,6 +42,7 @@
     int8_t instance;
 } DiscordRichPresence;
  */
+
 /**
  * Struct binding for a RichPresence
  */
@@ -65,6 +66,15 @@ public class DiscordRichPresence extends Structure
             "instance"
     ));
 
+    public DiscordRichPresence(String encoding) {
+        super();
+        setStringEncoding(encoding);
+    }
+
+    public DiscordRichPresence() {
+        this("UTF-8");
+    }
+
     /**
      * The user's current party status.
      * <br>Example: "Looking to Play", "Playing Solo", "In a Group"

src/main/java/club/minnced/discord/rpc/DiscordUser.java

@@ -27,9 +27,11 @@
 typedef struct DiscordUser {
     const char* userId;
     const char* username;
+    const char* discriminator;
     const char* avatar;
 } DiscordUser;
  */
+
 /**
  * Struct binding for a discord join request.
  */
@@ -42,6 +44,15 @@ public class DiscordUser extends Structure
             "avatar"
     ));
 
+    public DiscordUser(String encoding) {
+        super();
+        setStringEncoding(encoding);
+    }
+
+    public DiscordUser() {
+        this("UTF-8");
+    }
+
     /**
      * The userId for the user that requests to join
      */