New features

• Issue #2872270 by RajabNatshah, mostafadev: Optimization for the style of Enhanced Multiselect

Fixes #2872819 by tmin: Module not working with latest version of hashids

• Instagrams are now fully responsive #2807735: Make posts responsive. We also switched to the oEmbed Api from instagram to fetch all metadata. So there is no need anymore for an api key.

Initial version of Cincopa Drupal 8

Major changes:

- The checkout sidebar can now contain panes.
- The checkout complete page is now powered by a Twig template ('commerce-checkout-completion-message.html.twig')

- Major work on promotions:
1) Refactored and simplified API
2) Redesigned UI (listing, add/edit form)
3) Basic compatibility settings (Any promotion / Not with any other promotions)
4) New usage API (track and limit usage per promotion and per coupon)

- Brand new Tax submodule:
1) Supports entering prices with or without tax
2) Supports tax registrations (collect tax from other countries based on a store setting)
3) Remote (allowing for Avalara, Taxamo, etc) and local tax type plugins
4) Custom tax type plugin which allows entering multiple rates and specifying a zone
5) EuropeanUnionVat tax type plugin with predefined rates for all EU countries, and physical VS digital logic.
6) Tax rate resolvers (choose a reduced rate / no rate for specific order items, etc)
This replaces the tax code that was removed before beta1, rewritten for optimal performance and more features.

Alpha4 release with new event for breakpoint changes.