Migrated tests to jest

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

test2/drop/drop.js

@@ -0,0 +1,2 @@
+const drop = (arr, n = 1) => arr.slice(n);
+module.exports = drop;

test2/drop/drop.test.js

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+const expect = require('expect');
+const drop = require('./drop.js');
+
+test('Testing drop', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof drop === 'function').toBeTruthy();
+  expect(drop([1, 2, 3])).toEqual([2,3]);
+  expect(drop([1, 2, 3], 2)).toEqual([3]);
+  expect(drop([1, 2, 3], 42)).toEqual([]);
+});