Update PAC crates dependencies

[dkm]

m-labs (owner of PAC crates) does not plan on publishing new version on
crates.io and suggests using git instead.
See:
m-labs/dslite2svd#13

Until a better solution is found, this patch uses latest version of crates.

[eldruin]

Thanks for the proposal but sadly it is not possible to publish a crate to crates.io that uses a git dependency for (not dev-) dependencies. See here.

[dkm]

Oh... So, what are the possible solutions here ? Ask m-labs if they would be willing to transfer the ownership of the crates to rust-embedded-community ? I'm still learning but I would be willing to help if needed...

[eldruin]

Transferring would be a possibility, yes. I could help with review, publishing and so on. Furthermore, @thejpster is also part of this org.

[dkm]

Ok, I can go ask upstream if you want, but I don't want to overstep, just let me know. There's not urgency :)

[eldruin]

Sure. Actually, I think it would be appropriate if you would ask them yourself.
Technically you need to be a member of an org to transfer a repository to it so if they are interested, they can just transfer it to me and then I can transfer it to the org.

[thejpster]

We now have a fork of dslite2svd, and I've started an issue to discuss various improvements.

rust-embedded-community/tm4c-rs#1

[eldruin]

This has been done in #52