Migrated tests to jest

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

test2/defaults/defaults.js

@@ -0,0 +1,2 @@
+const defaults = (obj, ...defs) => Object.assign({}, obj, ...defs.reverse(), obj);
+module.exports = defaults;

test2/defaults/defaults.test.js

@@ -0,0 +1,9 @@
+const expect = require('expect');
+const defaults = require('./defaults.js');
+
+test('Testing defaults', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof defaults === 'function').toBeTruthy();
+  expect(defaults({ a: 1 }, { b: 2 }, { b: 6 }, { a: 3 })).toEqual({ a: 1, b: 2 });
+});