deps(iroh-net): Upgrade igd-next, remove hyper 0.14 (#2804)

## Description

This finally removes the last use of a pre-1.0 hyper version,
eliminating our duplicate hyper dependencies.

## Breaking Changes

None

## Notes & open questions

Closes #1863.


## Change checklist

- [x] Self-review.
- ~~[ ] Documentation updates following the [style
guide](https://rust-lang.github.io/rfcs/1574-more-api-documentation-conventions.html#appendix-a-full-conventions-text),
if relevant.~~
- ~~[ ] Tests if relevant.~~
- ~~[ ] All breaking changes documented.~~

Author: flub