Feature: add more configuration, fix overflow

[ViktorKirjanov]

Hi, i made a fork to fix an overflow error. Added additional options that allow you to change the size of the widget and text.

height - height of DayItem widget width - width of DayItem widget shrinkHeight - height of DayItem widget if shrink is true shrinkWidth - width of DayItem widget if shrink is true fontSize - digit size shrinkFontSize - digit size if shrink is true dayNameFontSize - day size shrinkDayNameFontSize - day size if shrink is true

also i found that the height of _buildDayList does not change with shrink option

Best, Viktor