Add lifecycle experimental badge

[jdhoffa]

experimental or maturing here?

I expect we still may want to totally revamp our pkgdown sites.

[cjyetman]

my not-so-important opinion here is that this repo is "mature" in that it does what it's supposed to do, we've been actively using it on public facing pages for many months, and there's no unsolved problems or bugs to fix (that I'm aware of). Sure, we may decide to change up the styling, but the basic functionality is pretty stable.

[jdhoffa]

Hmm, so it seems that the stage maturing has been deprecated LOL

https://lifecycle.r-lib.org/articles/stages.html#maturing

tidyverse folks argued that there was no real/ actionable difference between maturing and experimental. Either something has a stable API or it doesn't...

I think this will warrant us to more precisely define what/ how we want to define our stages

[AlexAxthelm]

+1 for mature.

Rationale: This repo doesn't have many PRs against it, and even if it did, none of them would be introducing what we would consider "breaking changes" for the rendered HTML.

[cjyetman]

I'd say it's "stable" then since how it's used is unlikely to change, though it's content/styling might change

[jdhoffa]

Sounds good :-)

[jdhoffa]

Will change tomorrow when I'm back at the computer