Migrated tests to jest

Used jest-codemods to migrate, will have to pass everything by hand before we can merge.

test6/toggleClass/toggleClass.js

@@ -0,0 +1,2 @@
+const toggleClass = (el, className) => el.classList.toggle(className);
+module.exports = toggleClass;

test6/toggleClass/toggleClass.test.js

@@ -0,0 +1,8 @@
+const expect = require('expect');
+const toggleClass = require('./toggleClass.js');
+
+test('Testing toggleClass', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof toggleClass === 'function').toBeTruthy();
+});