Create TypeScript definitions

[ivyrze]

I added TypeScript support so that those who use it can benefit. I did have to update the ical.js version so that we can link into their provided types. Thanks for your consideration!

[mifi]

thank you! I've reverted unrelated package-lock.json as well as ical.js upgrade because that could possibly be breaking

[ivyrze]

Hi @mifi, thank you for the merge! Unfortunately, due to the ical.js downgrade, the types don't appear to be fully functional. TS definitions were not added until 2.1.0, so any references to ical.js objects will be any, and VS Code confirms this when drilling deeper:

I understand the concern about updating to a new major version, but it may be a necessary evil. There is only one breaking change in the 2.0.0 release: adoption of ES6 syntax. ES6 was released over 10 years ago now, so I imagine the impact of this will be minimal. So long as we too note this in the release notes, I would be surprised if anyone turns their nose at it

[mifi]

Hi, ok I see. Did you test ical expander with ical.js 2 and it seems to be working?

[ivyrze]

Sorry I missed this. Yes I tested with ical.js@2.2.1 and everything worked great. Later versions probably work just as well but I haven't confirmed.