fix wrapper of null error after initializing custom EMCMap instances

allows EMCWrapper to be initialized with map instances in addition to booleans, so the wrapper instance is no longer null when some functions try to call it.

src/main/java/io/github/emcw/core/EMCWrapper.java

@@ -18,6 +18,10 @@ public EMCWrapper() {
         initMaps(true, true);
     }
 
+    public EMCWrapper(EMCMap aurora, EMCMap nova) {
+        initMaps(aurora, nova);
+    }
+
     /**
      * Returns a new {@link EMCWrapper} instance.
      * Maps may be initialized independently by passing their respective boolean values.
@@ -35,6 +39,13 @@ private void initMaps(@NotNull Boolean aurora, @NotNull Boolean nova) {
         instance = this;
     }
 
+    private void initMaps(EMCMap aurora, EMCMap nova) {
+        if (aurora != null) Aurora = aurora;
+        if (nova != null) Nova = nova;
+
+        instance = this;
+    }
+
     public static EMCWrapper instance() {
         return instance;
     }