Merge pull request #627 from Gjum/patch-1

/spawnbook as /introbook alias

plugins/simpleadminhacks-paper/src/main/java/com/programmerdan/minecraft/simpleadminhacks/hacks/Introbook.java

@@ -56,6 +56,7 @@ public class Introbook extends SimpleHack<IntrobookConfig> implements Listener,
             plugin().log("Registering introbook command");
             plugin().registerCommand("introbook", this);
             plugin().registerCommand("giveintrobook", this);
+            plugin().registerCommand("spawnbook", this);
         }
     }