.circleci/gemspec_compatible in truemail-2.6.4 vs .circleci/gemspec_compatible in truemail-2.6.5

@@ -22,10 +22,10 @@
     'source_code_uri' => 'https://github.com/truemail-rb/truemail',
     'documentation_uri' => 'https://truemail-rb.org/truemail-gem',
     'bug_tracker_uri' => 'https://github.com/truemail-rb/truemail/issues'
   }
 
-  spec.required_ruby_version = '>= 2.5.0'
+  spec.required_ruby_version = ['>= 2.5.0', '< 3.1.0']
 
   spec.files = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| ::File.basename(f) }
   spec.require_paths = ['lib']