Migrated tests to jest

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

test/reject/reject.test.js

@@ -1,24 +0,0 @@
-const test = require('tape');
-const reject = require('./reject.js');
-
-test('Testing reject', (t) => {
-  //For more information on all the methods supported by tape
-  //Please go to https://github.com/substack/tape
-  t.true(typeof reject === 'function', 'reject is a Function');
-
-  const noEvens = reject(
-    (x) => x % 2 === 0,
-    [1, 2, 3, 4, 5]
-  );
-
-  t.deepEqual(noEvens, [1, 3, 5]);
-
-  const fourLettersOrLess = reject(
-    (word) => word.length > 4,
-    ['Apple', 'Pear', 'Kiwi', 'Banana']
-  );
-
-  t.deepEqual(fourLettersOrLess, ['Pear', 'Kiwi']);
-
-  t.end();
-});