Adding to usage list before to hashmap for better concurrency.

src/main/java/ca/recrown/islandsurvivalcraft/caching/Cache.java

@@ -35,8 +35,8 @@ public class Cache<K, V> {
                 CacheValue<K, V> val = new CacheValue<>();
                 val.key = key;
                 val.value = value;
-                data.put(key, val);
                 usage.add(val);
+                data.put(key, val);
                 if (data.size() > maxSize) {
                     data.remove(usage.pop().key);
                 }