Update dependencies.

Author: gkellogg

rdf-rdfxml.gemspec

@@ -29,17 +29,17 @@ Gem::Specification.new do |gem|
   gem.requirements          = []
 
   gem.add_runtime_dependency     'rdf',             '~> 3.3'
-  gem.add_runtime_dependency     'rdf-xsd',         '~> 3.2'
+  gem.add_runtime_dependency     'rdf-xsd',         '~> 3.3'
   gem.add_runtime_dependency     'htmlentities',    '~> 4.3'
   gem.add_runtime_dependency     'builder',         '~> 3.2'
 
   gem.add_development_dependency 'json-ld',         '>= 3.3'
   gem.add_development_dependency 'rspec',           '~> 3.12'
   gem.add_development_dependency 'rspec-its',       '~> 1.3'
   gem.add_development_dependency 'rdf-isomorphic',  '~> 3.3'
-  gem.add_development_dependency 'rdf-turtle',      '~> 3.2'
-  gem.add_development_dependency 'rdf-spec',        '~> 3.2'
-  gem.add_development_dependency 'rdf-vocab',       '~> 3.2'
+  gem.add_development_dependency 'rdf-turtle',      '~> 3.3'
+  gem.add_development_dependency 'rdf-spec',        '~> 3.3'
+  gem.add_development_dependency 'rdf-vocab',       '~> 3.3'
   gem.add_development_dependency 'yard' ,           '~> 0.9'
 
   gem.post_install_message  = nil