Bump maven-core from 3.5.2 to 3.8.1

Bumps [maven-core](https://github.com/apache/maven) from 3.5.2 to 3.8.1.
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.5.2...maven-3.8.1)

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

hobbit-maven-plugin/pom.xml

@@ -14,7 +14,7 @@
         <dependency>
             <groupId>org.apache.maven</groupId>
             <artifactId>maven-core</artifactId>
-            <version>3.5.2</version>
+            <version>3.8.1</version>
           </dependency>        
         <dependency>
             <groupId>org.apache.maven</groupId>