Migrated tests to jest

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

test/get/get.js

@@ -1,9 +0,0 @@
-const get = (from, ...selectors) =>
-[...selectors].map(s =>
-s
-.replace(/\[([^\[\]]*)\]/g, '.$1.')
-.split('.')
-.filter(t => t !== '')
-.reduce((prev, cur) => prev && prev[cur], from)
-);
-module.exports = get;