Update changelog

Author: nvictus

CHANGES

@@ -4,14 +4,17 @@ Release Notes
 1.3.0 (2023-07-01)
 ++++++++++++++++++
 
+This release drops support for Python versions below 3.7
+
 * API changes:
 	- Added ``popvalue`` method to mirror recent ``topvalue`` addition.
-	- Added ``default`` argument to ``top`` and support for ``default`` using ``pop`` with PQ semantics, to return when the collection is empty.
+	- Added ``default`` argument to ``top`` and support for ``default`` using ``pop`` with PQ semantics. This value is returned when the collection is empty.
 
 * Maintenance:
 	- Dropped support for Python 2.7, 3.4, 3.5, and 3.6 (#22).
 	- Inlined type annotations and removed stub file. Thanks for advice from `@aqeelat <https://github.com/aqeelat>_`.
 	- Migrate to pyproject.toml
+	- Linting and static type checking in CI
 
 
 1.2.1 (2023-06-26)