Upgrade tidy-maven-plugin 1.1.0 -> 1.2.0

[Picnic-Bot]

This PR contains the following updates:

Package	Type	Update	Change
org.codehaus.mojo:tidy-maven-plugin (source)	build	minor	1.1.0 -> 1.2.0

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[Picnic-Bot]

Suggested commit message:

Upgrade tidy-maven-plugin 1.1.0 -> 1.2.0 (#271)

See:
- https://github.com/mojohaus/tidy-maven-plugin/releases/tag/tidy-maven-plugin-1.2.0
- https://github.com/mojohaus/tidy-maven-plugin/compare/tidy-maven-plugin-1.1.0...tidy-maven-plugin-1.2.0

[Stephan202]

This plugin isn't enabled by default, yet. We should open a separate PR to run tidy:check unless -Dverification.skip or -Dverification.warn is specified. (Due to the limited configurabiliy we my need to introduce the avoid-errors profile deleted in 3f6558b.) This change should be applied to the internal Maven Parent.

[rickie]

Nice, would like to pick this up but that will probably be after the release @Stephan202.

[Stephan202]

👍 Should be easier once we've reviewed @Badbond's related PR against the internal Maven parent.

[rickie]

We can merge once 🟢.