v2.1.7

What's Changed

• Show multiple items when initialize by @vuquangpham in #40
• use EventsManager & add configs.js by @phucbm in #45
• Add getOptionsFromAttribute() by @vandangnhathung in #46
• merge 2.1.7 by @phucbm in #47

Full Changelog: v2.1.6...v2.1.7