Resolve needless_borrow clippy lint

    warning: this expression creates a reference which is immediately dereferenced by the compiler
      --> src/main.rs:92:34
       |
    92 |             options += &packages[&member].name;
       |                                  ^^^^^^^ help: change this to: `member`
       |
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
       = note: `#[warn(clippy::needless_borrow)]` on by default

src/main.rs

@@ -89,7 +89,7 @@ fn do_main() -> Result<()> {
         let mut options = String::new();
         for (i, member) in metadata.workspace_members.iter().enumerate() {
             options += if i == 0 { "" } else { " | " };
-            options += &packages[&member].name;
+            options += &packages[member].name;
         }
         bail!(
             "Pass `-p [{}]` to select a single workspace member",