Feature: convert tab length

[rejhgadellaa]

Not sure if this is within the scope of this package but it would be nice if I could also convert, for example, files that use 2 spaces to tabs with 4 spaces (if that's what i have tab length configured for).

Example:

.some-css {
  prop: value;
}

Now when I have tab length set to 4, if I convert spaces to tabs, it doesn't see the indent before 'prop: value;' as an indent.

[lee-dohm]

This is largely out of scope for this package, but it might be an interesting thing for me to add. I'll leave this here for now and see if it strikes my fancy later 😀