Update craftapi to fix broken prevent-proxy api

Related #718

Author: games647

core/pom.xml

@@ -142,7 +142,7 @@
         <dependency>
             <groupId>com.github.games647</groupId>
             <artifactId>craftapi</artifactId>
-            <version>0.4</version>
+            <version>0.5.1</version>
         </dependency>
 
         <!-- APIs we can use because they are available in all platforms (Spigot, Bungee, Velocity) -->