Reverse dependencies for ruby-sdl2

Latest version of the following gems require ruby-sdl2

Gem	Version	Date	Downloads
nuklear +5.87 Thousand Downloads	`0.1.3` March 12, 2022	March 12, 2022	5.87 Thousand
hemi +5.33 Thousand Downloads	`0.0.4` January 02, 2021	January 02, 2021	5.33 Thousand
sdl2_vulkan +2.55 Thousand Downloads	`0.1.0` November 18, 2018	November 18, 2018	2.55 Thousand
game0flife +2.25 Thousand Downloads	`0.0.1` December 21, 2020	December 21, 2020	2.25 Thousand
psx +300 Downloads	`0.1.0` May 14, 2026	May 14, 2026	300