Update 1.001 - Boss Filter

For the September 27, 2021 update of the Arknights Randomizer, I've added a button that lets you toggle 💀Boss stages on and off. If toggled on, the randomized stages will result in stages that have bosses. Additionally, the 🎲Reroll button will reroll both operators and stages in the event the upper right button will be reworked at a later date.

Have fun, Doctors!