Update dependency org.apache.maven.plugins:maven-source-plugin to v3.3.1

This MR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.apache.maven.plugins:maven-source-plugin	3.2.1 -> 3.3.1

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This MR has been generated by Renovate Bot.

mentioned in issue #5

added 3 commits

• 01e306fe...7c342f50 - 2 commits from branch master
• 12f5bf5f - Update dependency org.apache.maven.plugins:maven-source-plugin to v3.3.1

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