Try and figure out what's up with encoding guessing

[hadley]

@gagolews any idea why stringi::stri_enc_detect() would return different values on different operating systems?

I'm generally regretful of providing this interface in the first place, so I might just remove the tests or deprecate the whole thing.

[gagolews]

I think it – unfortunately – strongly depends on the version of ICU installed... The heuristics behind the hood are highly imperfect, so I don't recommend being overly strict wrt the reproducibility of the results they generate.

[hadley]

Yeah, that's what I figured. I think the best bet is just to always skip these tests, which I've done on main.