Updated CHANGELOG.md

Author: simlay

CHANGELOG.md

@@ -120,11 +120,11 @@ Released YYYY/MM/DD
 
 ## Added
 
-* TODO (or remove section if none)
+* Objective-c bindings generate `From<ChildClass> for ParentClass` as well as `TryFrom<ParentClass> for ChildClass` (#1883).
 
 ## Changed
 
-* TODO (or remove section if none)
+* Objective-c bindings borrow self rather than take (#1883)
 
 ## Deprecated
 
@@ -136,12 +136,15 @@ Released YYYY/MM/DD
 
 ## Fixed
 
-* TODO (or remove section if none)
+* Fixed objective-c protocol impl blocks for parent classes's protocols (#1883).
 
 ## Security
 
 * TODO (or remove section if none)
 
+
+[#1883]: https://github.com/rust-lang/rust-bindgen/issues/1883
+
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 # 0.55.1