Fix front/back for Side enum.

src/main/java/li/cil/oc2/api/util/Side.java

@@ -24,16 +24,16 @@ public enum Side {
     NORTH(Direction.NORTH),
     north(NORTH),
     n(NORTH),
-    FRONT(NORTH),
-    front(NORTH),
-    f(NORTH),
+    BACK(NORTH),
+    back(NORTH),
+    b(NORTH),
 
     SOUTH(Direction.SOUTH),
     south(SOUTH),
     s(SOUTH),
-    BACK(SOUTH),
-    back(SOUTH),
-    b(SOUTH),
+    FRONT(SOUTH),
+    front(SOUTH),
+    f(SOUTH),
 
     WEST(Direction.WEST),
     west(WEST),