Release (v0.4.3)

Changes in this patch release:

• Fix nested recorded virtual function calls 7e8c13c
• Fix dr.gather/dr.scatter operations on quaternion types 9a7ac4e
• Fix gradient propagations on "special" types (quaternions, matrices, complex numbers) fe624de
• Add support for JIT types in dr.transform_decompose and dr.transform_compose 1244530
• Various minor bug fixes