Codacy style changes for test files

test/mapObject/mapObject.js

@@ -2,5 +2,4 @@ const mapObject = (arr, fn) =>
   (a => (
     (a = [arr, arr.map(fn)]), a[0].reduce((acc, val, ind) => ((acc[val] = a[1][ind]), acc), {})
   ))();
-
-module.exports = mapObject;
+module.exports = mapObject;