Support more browsers

[bates64]

Preferably at least the latest build of MS Edge - we will need testers for this (@TheInitializer?). This will likely be more polyfills -- https://polyfill.io -- over transpilation. Loads of browsers support async/await and friends already.

I think defining some hard version limits and sticking to them would be beneficial.

[TheInitializer]

Anyone have a Mac and willing to check if it works on Safari? I think we all use Firefox and Chrome, so it's probably untested on there as well as Edge.

The main issue with Edge right now is there's a JS method - Element.prepend - that isn't currently supported in Edge (I think it's coming in the next version though?) This breaks all the modals.

[kerrtravers]

Anyone have a Mac and willing to check if it works on Safari? I think we all use Firefox and Chrome, so it's probably untested on there as well as Edge.

I do. 👍

I've tested it on Safari, and I can't find anything wrong with the client at all, all settings and features seem to work as intended. 🎉