Don't assume `DEPOT_PATH` is populated

[KristofferC]

StyledStrings.jl/src/StyledStrings.jl

Line 21 in d7496d2

userfaces = joinpath(first(DEPOT_PATH), "config", "faces.toml")

will error on empty DEPOT_PATH

[tecosaur]

Ah, interesting. I assumed the DEPOT_PATH is always populated. Just not doing anything when this is the case seems like an obvious fix, but I'd be interested to know when this situation occurs.

[KristofferC]

You can set the depot path with an env variable (and set it to be empty).

[tecosaur]

Ah right thanks, I'll just apply the change Jeff suggests and do nothing when that's the case then.

[tecosaur]

Closed by #59.