Remove reqwest from dev-dependencies

[XAMPPRocky]

This PR removes reqwest from our dev-dependencies and replaces it with using hyper directly. This removes a number of dependencies that were only present with reqwest and on my machine reduces the total time for clean debug builds by five seconds. Dependency graphs generated with cargo-depgraph.

With Reqwest



cargo build --all --tests  226.34s user 21.31s system 445% cpu 55.542 total

No Reqwest

cargo build --all --tests  220.04s user 20.43s system 472% cpu 50.937 total

[quilkin-bot]

Build Succeeded 🥳

Build Id: e4265865-f2eb-43b1-ac4a-f5870502404b

To build this version:

git fetch git@github.com:googleforgames/quilkin.git pull/429/head:pr_429 && git checkout pr_429
cargo build