Add explicit dep to support OpenSSL 3.6

Fixes "certificate verify failed (unable to get certificate CRL)"
error with OpenSSL 3.6.0 by adding an explicit dep on the minimum patch version of the openssl default gem. ruby/openssl#950

Author: havenwood

hedra.gemspec

@@ -21,6 +21,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency 'concurrent-ruby', '~> 1.2'
   spec.add_dependency 'csv', '~> 3.2'
   spec.add_dependency 'http', '~> 5.1'
+  spec.add_dependency 'openssl', '>= 3.1.2'
   spec.add_dependency 'pastel', '~> 0.8'
   spec.add_dependency 'thor', '~> 1.2'
   spec.add_dependency 'tty-table', '~> 0.12'