Normalize source URLs

[senden9]

Fixes #115.
As said in the linked issue we should discus if this is enough normalization. Also I am not sure if it is a good idea to change values in the validation step.

Besides do the normalization I also adapted the test file so that the new feature will be tested. This test fails with the old version version of cargo-deny and passes with the changes in this PR.

[senden9]

CI cached a bug it seams. texture-synthesis is OK with the current release of cargo-deny but not with my modified version. I will take a look.

➜  texture-synthesis git:(main) ~/git/cargo-deny/target/debug/cargo-deny check
error: detected 'git' source not specifically allowed
   ┌─ /home/stefano/git/texture-synthesis/Cargo.lock:29:16
   │
29 │ img_hash 2.1.0 git+https://github.com/EmbarkStudios/img_hash.git?rev=c40da78#c40da78946840c810543e6ec53967afb7adafd74
   │                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ source
   │
   = img_hash v2.1.0
     └── (dev) texture-synthesis v0.8.0
         └── texture-synthesis-cli v0.8.0

warning: allowed source was not encountered
   ┌─ /home/stefano/git/texture-synthesis/deny.toml:45:5
   │
45 │     "https://github.com/EmbarkStudios/img_hash.git",
   │     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ no crate source matched these criteria

advisories ok, bans ok, licenses ok, sources FAILED

[Jake-Shadle]

Don't worry about, that repo is just outdated.

[Jake-Shadle]

Thanks for the PR! I've been bad about merging PRs so I'll just merge this now, can improve it later. 🙂