Depend on puppet-lint >= 2.5.0

[bastelfreak]

puppet-lint is required for Ruby 3 support.

[codecov]

Codecov Report

Merging #45 (5f302ad) into master (1c8c3ca) will not change coverage.
The diff coverage is n/a.

❗ Current head 5f302ad differs from pull request most recent head b97b271. Consider uploading reports for the commit b97b271 to get more accurate results

@@           Coverage Diff           @@
##           master      #45   +/-   ##
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  Coverage   28.33%   28.33%           
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  Files           2        2           
  Lines          60       60           
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  Hits           17       17           
  Misses         43       43           

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[ekohl]

I guess it doesn't hurt to explicitly depend on puppet-lint rather than implicitly.