Resolve needless_borrow clippy lint

warning: the borrowed expression implements the required traits
      --> src/manifest.rs:21:38
       |
    21 |     let content = fs::read_to_string(&manifest_path)?;
       |                                      ^^^^^^^^^^^^^^ help: change this to: `manifest_path`
       |
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
       = note: `-W clippy::needless-borrow` implied by `-W clippy::all`

src/manifest.rs

@@ -18,7 +18,7 @@ pub struct CargoPackage {
 
 pub fn parse(manifest_path: Option<&Path>) -> Result<CargoManifest> {
     let manifest_path = find_cargo_manifest(manifest_path)?;
-    let content = fs::read_to_string(&manifest_path)?;
+    let content = fs::read_to_string(manifest_path)?;
     let cargo_manifest: CargoManifest = toml::from_str(&content)?;
     Ok(cargo_manifest)
 }