- Implement `Default` on `Map` (not just on `RawMap`)
+- The implementation of `Into<RawMap<A>>` for `Map<A>` has been
+ replaced with the more general `From<Map<A>>` for `RawMap<A>`.
+
- Worked around the spurious `where_clauses_object_safety` future-compatibility lint that has been raised since mid-2018.
If you put `#![allow(where_clauses_object_safety)]` on your binary crates for this reason, you can remove it.