Bump version to v1.5.0.

Author: jmalloc

CHANGELOG.md

@@ -303,6 +303,7 @@ The two most important changes in usage are:
 [1.2.1]: https://github.com/dogmatiq/ferrite/releases/tag/v1.2.1
 [1.3.0]: https://github.com/dogmatiq/ferrite/releases/tag/v1.3.0
 [1.4.0]: https://github.com/dogmatiq/ferrite/releases/tag/v1.4.0
+[1.5.0]: https://github.com/dogmatiq/ferrite/releases/tag/v1.5.0
 
 <!-- version template
 ## [0.0.1] - YYYY-MM-DD