build(deps): update dependency org.codehaus.mojo:flatten-maven-plugin to v1.3.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.codehaus.mojo:flatten-maven-plugin (source)	1.2.7 -> 1.3.0

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BEGIN_COMMIT_OVERRIDE
deps: update dependency org.codehaus.mojo:flatten-maven-plugin to v1.3.0

This resolves the problem of test-scope dependencies unexpectedly excluded.
END_COMMIT_OVERRIDE

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[suztomo]

@meltsufin I wrote the analysis that the validation result is false positive #507 (comment) . The flatten plugin new version is working correctly. The validation logic is wrong.

[meltsufin]

@meltsufin I wrote the analysis that the validation result is false positive #507 (comment) . The flatten plugin new version is working correctly. The validation logic is wrong.

Can you create an issue for this? Would you be able to provide a fix so that we can upgrade the plugin?

[suztomo]

Issue #525

The fix in the dependencies.sh (templated in OwlBot post processor): https://github.com/googleapis/synthtool/pull/1663/files

[suztomo]

This should become green after googleapis/java-storage#1732 is merged to the main branch and we retry the "downstream / dependencies (11, java-storage)" check.

[suztomo]

I'm rebasing this pull request to see flatten plugin check.

[suztomo]

Good. It failed.

+ diff /home/runner/work/java-shared-config/java-shared-config/.kokoro/java-storage-v2.9.3-expected-flattened-dependencies.txt .actual-flattened-dependencies-list.txt
Diff from the expected file (java-storage-v2.9.3-expected-flattened-dependencies.txt):
15a16
> com.google.errorprone:error_prone_annotations:jar:2.14.0:compile