Linted everything, removed semistandard

test/squareSum/squareSum.js

@@ -0,0 +1,2 @@
+const squareSum = (...args) => args.reduce((squareSum, number) => squareSum + Math.pow(number, 2), 0);
+module.exports = squareSum;

test/squareSum/squareSum.test.js

@@ -0,0 +1,6 @@
+const expect = require('expect');
+const squareSum = require('./squareSum.js');
+
+test('squareSum is a Function', () => {
+  expect(squareSum).toBeInstanceOf(Function);
+});