Update version to sync with pypi.

Fix from, to properties on customtkinter CTKSlide.

Update version to sync with pypi.

Fix classifier.

Update version number.

Fix, delete current text before setting new value.

Update version to sync with pypi.

Upgrade version to sync with pypi.

Upgrade version to sync with pypi.

Prepare new version. closes alejandroautalan#282, closes alejandroaut…

…alan/pygubu-designer#200, closes alejandroautalan/pygubu-designer#203