Remove usage of moment library entirely

[rjray]

Is your feature request related to a problem? Please describe.
The moment library is very heavy in size and has several security vulnerabilities currently. It is also considered to be "maintenance only" at this point (https://momentjs.com/docs/#/-project-status/).

Describe the solution you'd like
I would like to see this library no longer required by this component. It could be replaced with something like date-fns if needed, which is lighter-weight and actively supported.

[nstanard]

@Ilaiwi Can I take over this package officially? I would also like moment to be removed. I'd also like to see newer react versions and typescript be supported. Please let me know ASAP. My team is currently researching vis-timeline vs this package.

[rjray]

I have been unable to allocate any time to contribute to this, so far. I would be in favor of letting @nstanard have a go at it.