Update version to 15.2
Update version to 15.2

stettberger/rofi,daemonl/rofi,ThomasAdam/rofi,eigengrau/rofi,jubalh/rofi,carnager/rofi,jreinert/rofi,daemonl/rofi,carnager/rofi,t-wissmann/rofi,jubalh/rofi,ThomasAdam/rofi,jreinert/rofi,eigengrau/rofi,t-wissmann/rofi,carnager/rofi,stettberger/rofi