Increase MSRV to 1.67 (#3234)

* Bump MSRV to 1.67

* clippy fixes

* cargo clippy: inline format args

* Add `clippy::uninlined_format_args` to cranky lints

* Fix clippy on wasm

* More clippy fixes

examples/user_attention/src/main.rs

@@ -19,7 +19,7 @@ fn main() -> eframe::Result<()> {
 }
 
 fn repr(attention: UserAttentionType) -> String {
-    format!("{:?}", attention)
+    format!("{attention:?}")
 }
 
 struct Application {