Add patch and test for Ruby 3.0 compatibility

Daniel Leidertrequested to merge
ruby-team/forks/puppet:master into master

I've just uploaded an NMU with the changes contained in this merge request due to https://bugs.debian.org/1001129.

  • d/patches/0014-Fix-Ruby-3.0-error.patch: Add patch.
    • Replace URI.escape by URI::DEFAULT_PARSER.escape (closes: #1001129).
  • d/patches/series: Enable new patch.
  • d/tests/control: Add a basic smoke test for these kind of issues.

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