Documentation: source must be valid UTF-8

[wollmers]

Symptom:

$ perl t/05_basic.t 
not ok 1 - use Levenshtein::Simple;
#   Failed test 'use Levenshtein::Simple;'
#   at t/05_basic.t line 18.
#     Tried to use 'Levenshtein::Simple'.
#     Error:  Can't decode ill-formed UTF-8 octet sequence <D0> 
	at /Users/helmut/perl5/perlbrew/perls/perl-5.32.0/lib/site_perl/5.32.0/Path/Tiny.pm 
	line 1801.

The error message could be more user friendly like:

File 'lib/Levenshtein/Simple.pm' does not pass Standard Perl.
Decoding error::
>  ill-formed UTF-8 octet sequence <D0>: at line 852, column 62

Of course this would need to use Encode::decode() directly instead of Path::Tiny::slurp.

[xsawyerx]

Are you interested in submitting a PR for this?