[Nintendo Switch] Atmosphere 0.19.4

Apenas mais um update para quem está atrasado, changelog:

Support was added for 12.0.3.
A number of minor issues were fixed, including:
- An issue was fixed that could cause heap memory corruption when allocation was highly contended.
- An issue was fixed that could cause sleep to fail under certain conditions.
- An issue was fixed that could cause a scheduler slow path to be taken more often than necessary.
General system stability improvements to enhance the user’s experience.