Migrated tests to jest

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

test6/stableSort/stableSort.test.js

@@ -0,0 +1,16 @@
+const expect = require('expect');
+const stableSort = require('./stableSort.js');
+
+test('Testing stableSort', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof stableSort === 'function').toBeTruthy();
+  //t.deepEqual(stableSort(args..), 'Expected');
+  //t.equal(stableSort(args..), 'Expected');
+  //t.false(stableSort(args..), 'Expected');
+  //t.throws(stableSort(args..), 'Expected');
+
+  const arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+  const compare = () => 0;
+  expect(stableSort(arr, compare)).toEqual(arr);
+});