dependabot maven(deps): bump maven-pmd-plugin from 3.19.0 to 3.20.0

Bumps maven-pmd-plugin from 3.19.0 to 3.20.0.

Commits

• 55c4d40 [maven-release-plugin] prepare release maven-pmd-plugin-3.20.0
• f3e188a [MPMD-361] Explicitly start and end tables with Doxia Sinks in report renderers
• b65c7a6 [MPMD-360] - Upgrade to PMD 6.53.0 (#109)
• 3c7a47e Remove method available from super class
• 6ee27fc [MPMD-358] - Upgrade to PMD 6.52.0 (#104)
• 1dcc7c1 Set next development version to 3.20.0-SNAPSHOT
• 255a35a (doc) Update releasenotes.md
• cd954cc [MPMD-335] - Aggregate mode doesn't use additional repositories
• 92434d0 add Reproducible Builds badge
• 7b6623b [MPMD-357] - Upgrade to PMD 6.51.0 (#100)
• Additional commits viewable in compare view