gemspec_compatible in truemail-2.7.5

- old
+ new
@@ -29,14 +29,14 @@
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| ::File.basename(f) }
   spec.require_paths = ['lib']
 
   spec.add_runtime_dependency 'simpleidn', '~> 0.2.1'
 
-  spec.add_development_dependency 'dns_mock', '~> 1.5', '>= 1.5.4'
+  spec.add_development_dependency 'dns_mock', '~> 1.5', '>= 1.5.5'
   spec.add_development_dependency 'ffaker', '~> 2.21'
   spec.add_development_dependency 'json_matchers', '~> 0.11.1'
   spec.add_development_dependency 'rake', '~> 13.0', '>= 13.0.6'
   spec.add_development_dependency 'rspec', '~> 3.11'
-  spec.add_development_dependency 'smtp_mock', '~> 1.2', '>= 1.2.1'
-  spec.add_development_dependency 'truemail-rspec', '~> 0.9.1'
-  spec.add_development_dependency 'webmock', '~> 3.17', '>= 3.17.1'
+  spec.add_development_dependency 'smtp_mock', '~> 1.2', '>= 1.2.2'
+  spec.add_development_dependency 'truemail-rspec', '~> 0.9.2'
+  spec.add_development_dependency 'webmock', '~> 3.18', '>= 3.18.1'
 end