Update dependencies.

Gemfile

@@ -5,7 +5,7 @@ gem 'rdf',      github: "ruby-rdf/rdf",       branch: "develop"
 gem 'rdf-xsd',  github: "ruby-rdf/rdf-xsd",   branch: "develop"
 
 group :development do
-  gem 'linkeddata',         github: "ruby-rdf/linkeddata",          branch: "develop"
+  gem 'linkeddata'
   gem 'ebnf',               github: "dryruby/ebnf",                 branch: "develop"
   gem 'json-ld',            github: "ruby-rdf/json-ld",             branch: "develop"
   gem 'rdf-aggregate-repo', github: "ruby-rdf/rdf-aggregate-repo",  branch: "develop"

rdf-tabular.gemspec

@@ -31,17 +31,17 @@ Gem::Specification.new do |gem|
   gem.requirements          = []
   gem.add_runtime_dependency     'bcp47_spec',      '~> 0.2'
   gem.add_runtime_dependency     'rdf',             '~> 3.3'
-  gem.add_runtime_dependency     'rdf-vocab',       '~> 3.2'
-  gem.add_runtime_dependency     'rdf-xsd',         '~> 3.2'
+  gem.add_runtime_dependency     'rdf-vocab',       '~> 3.3'
+  gem.add_runtime_dependency     'rdf-xsd',         '~> 3.3'
   gem.add_runtime_dependency     'json-ld',         '~> 3.3'
   gem.add_runtime_dependency     'addressable',     '~> 2.8'
   gem.add_development_dependency 'nokogiri',        '~> 1.15', '>= 1.13.4'
   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-spec',        '~> 3.3'
-  gem.add_development_dependency 'rdf-turtle',      '~> 3.2'
-  gem.add_development_dependency 'sparql',          '~> 3.2'
+  gem.add_development_dependency 'rdf-turtle',      '~> 3.3'
+  gem.add_development_dependency 'sparql',          '~> 3.3'
   gem.add_development_dependency 'webmock',         '~> 3.19'
   gem.add_development_dependency 'yard' ,           '~> 0.9'