Add option to disable trimming of dashes and underscores

Add portuguese language (#78)

Co-authored-by: Guilherme Santos <guilherme.santos.ext@qonto.com>
Co-authored-by: Dobrosław Żybort <matrixik@gmail.com>

Fixed truncation issue (#77)

Small improvements to tests

New language: hu/hun/hungarian (#65)

Add more info to readme (#62)

Update gosimple/unidecode with performance improvements (#61)

Performance improvements thanks to @stefanb

Add Czech language (#59)

* feat: add czech language

* fix: fix wrong czech word for symbol @

Add benchmarking info to README

Style fixes in README.

Fix kkSub alphabetic order