Bump net.alchim31.maven:scala-maven-plugin from 4.8.1 to 4.9.0

Bumps net.alchim31.maven:scala-maven-plugin from 4.8.1 to 4.9.0.

---
updated-dependencies:
- dependency-name: net.alchim31.maven:scala-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

jmock-imposters-testdata/pom.xml

@@ -28,7 +28,7 @@
             <plugin>
                 <groupId>net.alchim31.maven</groupId>
                 <artifactId>scala-maven-plugin</artifactId>
-                <version>4.8.1</version>
+                <version>4.9.0</version>
                 <executions>
                     <execution>
                         <goals>