embassy-rp: update the rand_core version ?

[ValouBambou]

Hi, I was writing a "generic" driver that I could reuse with multiple MCUs. This driver requires some random number generator for its initialization. The init function looks roughly like this

pub async fn init<RNG:rand_core::RngCore>(rng: &mut RNG) -> Self;

When I tried to use it with RoscRng I got some compiler error about DerefMut and a note that helps me to figure out that the issue was 2 different versions of rand_core (0.9.2 in my driver lib and 0.6.4 used in embassy-rp).

This is fine I can pin the rand_core version to match the one in embassy-rp, but this isn't really generic and can also prevent the use of the driver lib for users using newer versions of rand_core.

Does embassy need this particular version of rand_core and not a newer one?
Can we update this dependency?
In general, does it exist a solution for such dependency issue for an external library like mine?