Codacy style changes for test files

test/sumBy/sumBy.js

@@ -1,4 +1,3 @@
 const sumBy = (arr, fn) =>
   arr.map(typeof fn === 'function' ? fn : val => val[fn]).reduce((acc, val) => acc + val, 0);
-
-module.exports = sumBy;
+module.exports = sumBy;