Rust 1.77 and 1.78: The Changes That Happened to u128/i128

Rust has long had an inconsistency with C regarding the alignment of 128-bit integers. This problem has recently been resolved, but the fix comes with some effects that are worth being aware of. As a user, you most likely do not need to worry about these changes unless you are. Ignoring the `improper_ctypes*` lints and using these types in FFI.