Migrated tests to jest

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

test6/runPromisesInSeries/runPromisesInSeries.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const runPromisesInSeries = require('./runPromisesInSeries.js');
+
+test('Testing runPromisesInSeries', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof runPromisesInSeries === 'function').toBeTruthy();
+  const delay = d => new Promise(r => setTimeout(r, d));
+  runPromisesInSeries([() => delay(100), () => delay(200).then(() => )]);
+});