Guard accessing the underlying Termenv output behind a mutex. Multiple goroutines can set/get the dark background color causing a race condition.
Needs: https://github.com/muesli/termenv/pull/146
* feat: convert tabs to spaces with Style.TabWidth(int)
By default tabs will be converted to 4 spaces. To disable tab
conversion set Style.TabWidth(NoTabConversion).
Multiple lipgloss renderer instances can end up using the same default
termenv.Output. This leads to a race condition when manipulating the
ColorProfile concurrently.
We could mutex protect the standard output in termenv, but it feels like
a weak promise, as the rest of the Output wouldn't (and probably
shouldn't) get protected. Protecting it in lipgloss itself would require
a global lock however.
I can't come up with a proper use-case for this scenario, and therefore
we shift this responsibility to the user.
