Update MSRV from 1.86 to 1.88 (#7579)

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>

crates/egui/src/lib.rs

@@ -3,7 +3,7 @@
 //! Try the live web demo: <https://www.egui.rs/#demo>. Read more about egui at <https://github.com/emilk/egui>.
 //!
 //! `egui` is in heavy development, with each new version having breaking changes.
-//! You need to have rust 1.86.0 or later to use `egui`.
+//! You need to have rust 1.88.0 or later to use `egui`.
 //!
 //! To quickly get started with egui, you can take a look at [`eframe_template`](https://github.com/emilk/eframe_template)
 //! which uses [`eframe`](https://docs.rs/eframe).

crates/emath/src/smart_aim.rs

@@ -113,7 +113,7 @@ fn simplest_digit_closed_range(min: i32, max: i32) -> i32 {
     if min <= 5 && 5 <= max {
         5
     } else {
-        (min + max) / 2
+        min.midpoint(max)
     }
 }