nix: update to rust-1.67

Rust 1.67 was announced[0].

Update the nix sources to be on par with the latest rustc version.

This required fixes to clippy warnings for using variable
interpolation for format strings.

There was also an advisory error related to libgit2-sys[1], which is
transitively depended on via git2. The fix is included in the 0.16.1
version of git2.

[0]: https://blog.rust-lang.org/2023/01/26/Rust-1.67.0.html
[1]: https://rustsec.org/advisories/RUSTSEC-2023-0003

Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett

radicle-git-ext/Cargo.toml

@@ -19,7 +19,7 @@ percent-encoding = "2"
 thiserror = "1"
 
 [dependencies.git2]
-version = "0.15.0"
+version = "0.16.1"
 default-features = false
 features = ["vendored-libgit2"]
 

radicle-git-ext/src/reference/name.rs

@@ -340,7 +340,7 @@ impl OneLevel {
     }
 
     pub fn into_qualified(self, category: RefLike) -> Qualified {
-        Qualified(format!("refs/{}/{}", category, self))
+        Qualified(format!("refs/{category}/{self}"))
     }
 }
 
@@ -454,7 +454,7 @@ impl From<RefLike> for Qualified {
         if path.starts_with("refs/") {
             Self(path)
         } else {
-            Self(format!("refs/heads/{}", path))
+            Self(format!("refs/heads/{path}"))
         }
     }
 }

radicle-git-ext/t/Cargo.toml

@@ -24,7 +24,7 @@ serde = "1"
 serde_json = "1"
 
 [dependencies.git2]
-version = "0.15.0"
+version = "0.16.1"
 default-features = false
 features = ["vendored-libgit2"]