Test migration to jest by hand

Apparently using regular expressions is way easier.

test/isTypedArray/isTypedArray.test.js

@@ -0,0 +1,8 @@
+const expect = require('expect');
+const isTypedArray = require('./isTypedArray.js');
+
+
+  test('isTypedArray is a Function', () => {
+  expect(isTypedArray).toBeInstanceOf(Function);
+});
+