Update CHANGELOG.md

CHANGELOG.md

@@ -4,6 +4,11 @@ All notable changes to `postmark-inbound` will be documented in this file.
 
 ## [Unreleased]
 
+## [2.3.10] - 2020-03-03
+
+### Changed
+- Updated version constraint. [`564423b`](https://github.com/mvdnbrk/postmark-inbound/commit/564423b8ea729d8cd0cb0d6a2df4d305d7edd004)
+
 ## [2.3.9] - 2020-03-03
 
 ### Changed
@@ -160,7 +165,8 @@ All notable changes to `postmark-inbound` will be documented in this file.
 - Code style fixes. [`7c8eb86`](https://github.com/mvdnbrk/postmark-inbound/commit/7c8eb86cbf9719fbb568160decf4ae8dc735ce98)
 - PHPUnit minimum version set to 5.4.3. [`c2331a4`](https://github.com/mvdnbrk/postmark-inbound/commit/c2331a48557ef88f67b2a7df1176cccf05a2b3e8)
 
-[Unreleased]: https://github.com/mvdnbrk/postmark-inbound/compare/v2.3.9...HEAD
+[Unreleased]: https://github.com/mvdnbrk/postmark-inbound/compare/v2.3.10...HEAD
+[2.3.10]: https://github.com/mvdnbrk/postmark-inbound/compare/v2.3.9...v2.3.10
 [2.3.9]: https://github.com/mvdnbrk/postmark-inbound/compare/v2.3.8...v2.3.9
 [2.3.8]: https://github.com/mvdnbrk/postmark-inbound/compare/v2.3.7...v2.3.8
 [2.3.7]: https://github.com/mvdnbrk/postmark-inbound/compare/v2.3.6...v2.3.7