Migrated tests to jest

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

test/pull/pull.js

@@ -1,7 +0,0 @@
-const pull = (arr, ...args) => {
-let argState = Array.isArray(args[0]) ? args[0] : args;
-let pulled = arr.filter((v, i) => !argState.includes(v));
-arr.length = 0;
-pulled.forEach(v => arr.push(v));
-};
-module.exports = pull;