Bump underscore from 1.13.3 to 1.13.4

[dependabot[bot]]

Bumps underscore from 1.13.3 to 1.13.4.

Commits

• a15d1af Update generated files, tag 1.13.4 release
• 979dfc4 Merge branch 'prepare-1.13.4'
• fcb149d Add a change log entry for 1.13.4
• cf6ed6f Bump the version to 1.13.4
• 75d257f Merge pull request #2959 from petschki/module-federation-version
• 46d77d3 Fix for webpack module federation "No version" error
• da06656 Merge pull request #2956 from zackschuster/patch-1
• adf8838 fix heading nesting
• 5af5ecb update contributing to clarify how to clone from other sources
• 6ce24a2 add fsck error workaround to contributing.md #2887
• Additional commits viewable in compare view

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