fixed merge issue

Author: David-OConnor

CHANGELOG.md

@@ -31,6 +31,7 @@
 - Added flag `#![forbid(unsafe_code)]` so the Seed will be marked as a safe library by the Rust community tools.
 - Removed `clone` restriction from the method `Effect::map_msg`.
 - Implemented `UpdateEl` for `FlatMap`.
+- Adapted to Rust 1.41.0.
 
 ## v0.5.1
 - [BREAKING] `MessageMapper::map_message` changed to `MessageMapper::map_msg`.