Bump tar from 6.0.2 to 6.0.5 (#14758)

Bumps [tar](https://github.com/npm/node-tar) from 6.0.2 to 6.0.5.
- [Release notes](https://github.com/npm/node-tar/releases)
- [Changelog](https://github.com/npm/node-tar/blob/master/CHANGELOG.md)
- [Commits](https://github.com/npm/node-tar/compare/v6.0.2...v6.0.5

)

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