Support for multiple Yubikeys and Maintenance

[ashuio]

Hi, @wisespace-io
This PR adds support for multiple YubiKeys and closes #14

It also bumped dependencies. 

[ashuio]

Hi @wisespace-io ,

Can you review merge and publish?

[louib]

@ashuio looking forward to this feature!

Was bumping the dependencies a requirement for implementing this feature? I would suggest opening a separate PR for the dependency changes that are not related to the new feature.

Also, it looks like the code was auto-formatted. Ideally that would be isolated in the first commit, to make it easier to review the PR without reviewing the reformatting.

[ashuio]

@louib, Thanks for taking a look at this

The dependency updates are not strictly required for the new features but since we're bumping the version number, I included that in the PR.

Unfortunately, I won't be able to open another PR as of now dur to time constraints on other Projects.

[ashuio]

hey @louib since we haven't heard from @wisespace-io for so long I was forced to fork this project and publish a new crate with my changes in order to use it in my own app.

https://github.com/ashuio/yubikey-hmac-otp

https://crates.io/crates/yubikey-hmac-otp

[ashuio]

Hey @louib can you send the invite again to

[email protected]

[wisespace-io]

@louib and @ashuio , sorry for the silence. I merged the previous PR, we have merging conflicts here now. Could you fix them so I can merge this one as well?

[wisespace-io]

By the way, I see the you have a fork now. However, if you want to maintain this project, I can give you access.