chore: update toolchain to 1.84.1. apply clippy fixes & rustfmt (#1026)

* chore: update to stable toolchain. apply clippy fixes & rustfmt

* Bump MSRV

* Try MSRV without the patch version

* fix: pin toolchain to MSRV

* trying again

* fix dead code warning

---------

Co-authored-by: Dan Sully <dsully@users.noreply.github.com>

src/utils.rs

@@ -86,7 +86,7 @@ pub fn editor() -> Vec<String> {
     env::var("EDITOR")
         .unwrap_or_else(|_| String::from(if cfg!(windows) { "notepad" } else { "vi" }))
         .split_whitespace()
-        .map(|s| s.to_owned())
+        .map(std::borrow::ToOwned::to_owned)
         .collect()
 }