chore(package.json): upgrade should to ^4.3.0
test(array_filter): strict policy for array and object
test(array_map): strict policy for array and object
Merge pull request #34 from tomchentw/fix/upgrade-of-shouldjs

Fix/upgrade of shouldjs
style(lib): fix warings for jshint and move complex expression out
test(atob): fix wrong test case and require in index.js