leaflet.extras2 1.2.1

• Fixed bugs when Sidebar is used inside Shiny modules. The sidebar functions addSidebar and openSidebar now have an argument ns, where Shiny's namespacing function (e.g: session$ns) can be included.
• Arrowheads now passes all options in arrowheadOptions to L.polyline
• Update leaflet.heightgraph to 1.3.2. Has no dependency to d3 anymore.
• Skip tests which use an internet connection
• Adapted URLs and deleted old Mapkey URL