[MNG-6852] Upgrade maven-source-plugin from 3.2.0 to 3.2.1
[MNG-6852] Upgrade maven-source-plugin from 3.2.0 to 3.2.1

Closes #316
mcculls/maven,apache/maven,mcculls/maven,olamy/maven,mcculls/maven,cstamas/maven,apache/maven,olamy/maven,olamy/maven,cstamas/maven,apache/maven,cstamas/maven