add rdoc dev dependency, as it is not included in Ruby 4.0

digitaltom · digitaltom · commit 82e4f2a5a3aa · 2025-12-28T22:46:43.000+01:00
diff --git a/gpx.gemspec b/gpx.gemspec
@@ -24,5 +24,6 @@ Gem::Specification.new do |s|
   s.add_dependency 'rake'
   s.add_development_dependency 'bundler'
   s.add_development_dependency 'minitest'
+  s.add_development_dependency 'rdoc'
   s.add_development_dependency 'rubocop'
 end
