Update v2.1 - Catching up to Aseprite

This update is a refresh that adds new icons to Aseprite 95, it aligns the theme with the newest (beta) version of Aseprite. ✌️

Changes:

• [Improvement] Update the theme to make it compatible with the newest version of Aseprite (v1.3.14-beta1)
• [Fix] Add a shadow under the line connecting linked cels (thanks to 2Facedoff for reporting this)