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/download_image/src/main.rs

@@ -58,8 +58,7 @@ fn parse_response(response: ehttp::Response) -> Result<RetainedImage, String> {
         RetainedImage::from_image_bytes(&response.url, &response.bytes)
     } else {
         Err(format!(
-            "Expected image, found content-type {:?}",
-            content_type
+            "Expected image, found content-type {content_type:?}"
         ))
     }
 }