[PATCH] support rdoc 6.0

[Eric Wong <e@80x24.org>]

Supporting rdoc 6.0 required no actual code changes on our
part, and I'm not seeing any obvious compatibilities when
view git history of https://github.com/ruby/rdoc.git

Diffing the output seems to reveal no changes, either.
---
 lib/rdoc/discover.rb | 2 +-
 olddoc.gemspec       | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/rdoc/discover.rb b/lib/rdoc/discover.rb
index 30c5ae2..00242e9 100644
--- a/lib/rdoc/discover.rb
+++ b/lib/rdoc/discover.rb
@@ -1,6 +1,6 @@
 # :stopdoc:
 begin
-  gem 'rdoc', [ '>= 4.2', '< 6.0' ]
+  gem 'rdoc', [ '>= 4.2', '< 7.0' ]
   require_relative '../olddoc'
 rescue Gem::LoadError
 end unless defined?(Olddoc)
diff --git a/olddoc.gemspec b/olddoc.gemspec
index f84ee6c..c218378 100644
--- a/olddoc.gemspec
+++ b/olddoc.gemspec
@@ -17,7 +17,7 @@ Gem::Specification.new do |s|
   s.files = manifest
 
   # works fine with RDoc 5.x
-  s.add_dependency('rdoc', ['>= 4.2', '< 6.0'])
+  s.add_dependency('rdoc', ['>= 4.2', '< 7.0'])
   s.required_ruby_version = '>= 1.9.3'
   s.homepage = Olddoc.config['rdoc_url']
   s.licenses = 'GPL-3.0+'
-- 
EW