Update dependencies and version for 3.2.0 release. Minimum ruby version now 2.6.

Author: gkellogg

.github/workflows/ci.yml

@@ -27,7 +27,6 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - 2.5
           - 2.6
           - 2.7
           - 3.0

VERSION

@@ -1 +1 @@
-3.1.2
+3.2.0

rdf-spec.gemspec

@@ -18,15 +18,15 @@ Gem::Specification.new do |gem|
   gem.files              = %w(AUTHORS CREDITS README.md UNLICENSE VERSION) + Dir.glob('etc/*') + Dir.glob('lib/**/*.rb') + Dir.glob('spec/*.rb')
   gem.require_paths      = %w(lib)
 
-  gem.required_ruby_version      = '>= 2.4'
+  gem.required_ruby_version      = '>= 2.6'
   gem.requirements               = []
-  gem.add_runtime_dependency     'rdf',             '~> 3.1', '>= 3.1.8'
-  gem.add_runtime_dependency     'amazing_print',   '~> 1.2'
+  gem.add_runtime_dependency     'rdf',             '~> 3.2'
+  gem.add_runtime_dependency     'amazing_print',   '~> 1.4'
   gem.add_runtime_dependency     'rdf-isomorphic',  '~> 3.1'
-  gem.add_runtime_dependency     'rspec',           '~> 3.9'
+  gem.add_runtime_dependency     'rspec',           '~> 3.10'
   gem.add_runtime_dependency     'rspec-its',       '~> 1.3'
   gem.add_runtime_dependency     'rexml',           '~> 3.2'  # For Webmock
-  gem.add_runtime_dependency     'webmock',         '~> 3.7'
+  gem.add_runtime_dependency     'webmock',         '~> 3.14'
   gem.add_development_dependency 'yard' ,           '~> 0.9'
   gem.post_install_message        = nil
 end