fix: make fetches work again by using safe-performance mode of git-repository.

This fixes the 'zlib stream broken' issue when fetching crates.io
changes which was caused by `git-repository` configuring for
max-performance by default, which affects a crate used by `git2` as
well. For some reason, changing to `zlib-ng` as backend wasn't taken
kindly by `libgit2` causing it to fail after a short while of receiving
a pack from the remote.

The fix avoids making such modifications to the zlib crate, allowing
both crates, `git-repository` and `git2` to co-exist in the same
dependency tree.

Author: Byron

Cargo.toml

@@ -15,7 +15,7 @@ include = ["src/**/*", "LICENSE.md", "README.md", "CHANGELOG.md"]
 test = false
 
 [dependencies]
-git-repository = "0.23.0"
+git-repository = { version = "0.23.1", default-features = false, features = ["max-performance-safe"] }
 similar = { version = "2.2.0", features = ["bytes"] }
 serde = { version = "1", features = ["std", "derive"] }
 serde_json = "1"