build(deps): update minitar requirement from ~> 0.12 to >= 0.12, < 2.0

Updates the requirements on [minitar](https://github.com/halostatue/minitar) to permit the latest version.
- [Changelog](https://github.com/halostatue/minitar/blob/main/History.md)
- [Commits](halostatue/minitar@v0.12...v0.12)

---
updated-dependencies:
- dependency-name: minitar
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

beaker.gemspec

@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
  s.add_development_dependency 'voxpupuli-rubocop', '~> 2.8.0'
 
  # Run time dependencies
- s.add_runtime_dependency 'minitar', '~> 0.12' # newer versions require Ruby 3.1
+ s.add_runtime_dependency 'minitar', '>= 0.12', '< 2.0' # newer versions require Ruby 3.1
  s.add_runtime_dependency 'minitest', '~> 5.4'
  s.add_runtime_dependency 'rexml', '~> 3.2', '>= 3.2.5'