[seabreeze] update changelog and fix links

CHANGELOG.md

@@ -13,7 +13,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 
 ## [Unreleased]
-...
+### Changed
+- drop support for Python 2.7 to 3.5 (require py36+)
 
 ## [1.3.0] - 2020-08-23
 ### Added
@@ -141,7 +142,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 - Don't require numpy during build of cseabreeze cython extension
 
-[Unreleased]: https://github.com/ap--/python-seabreeze/compare/v1.2.0...HEAD
+[Unreleased]: https://github.com/ap--/python-seabreeze/compare/v1.3.0...HEAD
+[1.3.0]: https://github.com/ap--/python-seabreeze/compare/v1.2.0...v1.3.0
 [1.2.0]: https://github.com/ap--/python-seabreeze/compare/v1.1.0...v1.2.0
 [1.1.0]: https://github.com/ap--/python-seabreeze/compare/v1.0.2...v1.1.0
 [1.0.2]: https://github.com/ap--/python-seabreeze/compare/v1.0.1...v1.0.2