Test migration to jest by hand

Apparently using regular expressions is way easier.

test/omitBy/omitBy.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const omitBy = require('./omitBy.js');
+
+
+  test('omitBy is a Function', () => {
+  expect(omitBy).toBeInstanceOf(Function);
+});
+  t.deepEqual(omitBy({ a: 1, b: '2', c: 3 }, x => typeof x === 'number'), { b: '2' }, 'Creates an object composed of the properties the given function returns falsey for');
+  
+