Update lint.go to add UTF8 as initialism.
Update lint.go to add UTF8 as initialism.

Fixes #21.

Signed-off-by: David Symonds <7f6bb564ed9e580d4f0aa90d53b34578e5d24cb9@golang.org>

lutzky/lint,JekaMas/hint,hellosuper/gohint,NichoZhang/lint,kovetskiy/lint,golang/lint,zimmski/lint,darkliquid/lintci,elgris/hint,gorcz/lint,tmc/lint