CHANGELOG: All patches are applied

CHANGELOG.md

@@ -16,6 +16,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Fixed issue where updated dependencies of substitution files did not retrigger a .db expansion.
 
 ### Other changes
+* Patch system now applies all patches in the `patch/` directory. Versioning for patches should be handled by git,
+  not by require.
 
 ## [4.0.0]