Update dependency net.dv8tion:JDA to v6

pom.xml

@@ -22,7 +22,7 @@
         <dependency>
             <groupId>net.dv8tion</groupId>
             <artifactId>JDA</artifactId>
-            <version>5.6.1</version>
+            <version>6.4.1</version>
         </dependency>
         <!-- JDA depends on SLF4J for logging -->
         <dependency>
@@ -78,7 +78,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.14.0</version>
+            <version>2.13.2</version>
         </dependency>
         <dependency>
             <groupId>commons-codec</groupId>