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

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

src/self_update.rs

@@ -9,7 +9,7 @@ use rust_i18n::t;
 use self_update_crate::backends::github::Update;
 use self_update_crate::update::UpdateStatus;
 
-use super::terminal::*;
+use super::terminal::{print_info, print_separator};
 #[cfg(windows)]
 use crate::error::Upgraded;