Updated BitBucket pipeline.
Updated Maven Wrapper.

Updated SLF4J 1.7.31 to 1.7.32.
Updated JUnit 5.7.2 to 5.8.0.
Updated Mockito 3.11.2 to 3.12.4.

Now you can do:
git clone
mvnw clean install

It doesn't require to download and install Maven.