update to axum v0.7

[utterstep]

Hi! First of all, thank you for your lib!

This PR updates the axum dependency to v0.7 – what do you think about it? 0.7 was released a bit more than a year ago and the there is already RC for 0.8.

[cmackenzie1]

Thanks @utterstep, this looks great. I think we need to bump hyper as well to 1.0 and it should be good to merge!

[utterstep]

Thank you for the feedback! I updated the example to use axum::serve to keep it simple, is that OK?

It can be found in c92620a

I also noticed that some of the dependencies were used only indirectly, by other dependencies (like hyper, tower, serde_json). I took the liberty of removing them in the separate commit. Also, I moved chrono to dev-dependencies as it is only the example code that depends on it, and not the lib.
This was done in the 7873c88.

And lastly I updated reqwest and jsonwebtoken to the latest versions also in bfa0b6d.

I understand that last two commits are out of the scope of the PR so in case you'd like to keep to the original purpose – I have no problems reverting any of them or both.

[cmackenzie1]

Looks great, thanks @utterstep !

[cmackenzie1]

Version 0.2.0 has been published with these changes!

https://github.com/cmackenzie1/axum-jwt-auth/releases/tag/v0.2.0
https://crates.io/crates/axum-jwt-auth/0.2.0
https://docs.rs/crate/axum-jwt-auth/0.2.0