upgraded to kotlin 0.8.11

Signed-off-by: Laszlo Hornyak <laszlo.hornyak@gmail.com>
updated version number

Signed-off-by: Laszlo Hornyak <laszlo.hornyak@gmail.com>
update to the documentation for the 0.8.11 release

Signed-off-by: Laszlo Hornyak <laszlo.hornyak@gmail.com>