use toolbox from PyPI
use toolbox from PyPI

Left wo/ version number so the latest version is used

Fix #268

marcusrehm/serenata-de-amor,marcusrehm/serenata-de-amor,datasciencebr/serenata-de-amor,marcusrehm/serenata-de-amor,marcusrehm/serenata-de-amor,datasciencebr/serenata-de-amor