Bump maven-buildtime-extension from 3.0.0 to 3.0.3

Bumps [maven-buildtime-extension](https://github.com/timgifford/maven-buildtime-extension) from 3.0.0 to 3.0.3.
- [Release notes](https://github.com/timgifford/maven-buildtime-extension/releases)
- [Commits](timgifford/maven-buildtime-extension@v3.0.0...v3.0.3)

---
updated-dependencies:
- dependency-name: co.leantechniques:maven-buildtime-extension
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

.mvn/extensions.xml

@@ -13,6 +13,6 @@
     <extension>
         <groupId>co.leantechniques</groupId>
         <artifactId>maven-buildtime-extension</artifactId>
-        <version>3.0.0</version>
+        <version>3.0.3</version>
     </extension>
 </extensions>