feat: add Ciphers option to SSL Option

Gemfile

@@ -4,13 +4,13 @@ source 'https://rubygems.org'
 gemspec
 
 gem 'faraday', '>= 1.0'
-
 gem 'rake', '~> 13.0'
 gem 'rspec', '~> 3.0'
-gem 'simplecov', '~> 0.19.0'
+gem 'simplecov', '~> 0.22.0'
 
 gem 'webmock', '~> 3.4'
 
-gem 'rubocop', '~> 1.12.0'
+less_than_ruby_v27 = Gem::Version.new(RUBY_VERSION) < Gem::Version.new('2.7.0')
+gem 'rubocop', less_than_ruby_v27 ? '~> 1.12.0' : '~> 1.66.0'
 gem 'rubocop-packaging', '~> 0.5'
-gem 'rubocop-performance', '~> 1.0'
+gem 'rubocop-performance', '~> 1.20'

lib/faraday/adapter/httpclient.rb

@@ -48,7 +48,7 @@ def call(env)
 
           if (req = env[:request]).stream_response?
             warn "Streaming downloads for #{self.class.name} " \
-              'are not yet implemented.'
+                 'are not yet implemented.'
             req.on_data.call(resp.body, resp.body.bytesize)
           end
           save_response env, resp.status, resp.body, resp.headers, resp.reason
@@ -101,6 +101,11 @@ def configure_ssl(client, ssl)
         ssl_config.add_trust_ca ssl[:ca_path] if ssl[:ca_path]
         ssl_config.client_cert = ssl[:client_cert] if ssl[:client_cert]
         ssl_config.client_key = ssl[:client_key] if ssl[:client_key]
+
+        if support_ciphers?(ssl)
+          ssl_config.ciphers = ssl[:ciphers]
+        end
+
         ssl_config.verify_depth = ssl[:verify_depth] if ssl[:verify_depth]
       end
 
@@ -147,6 +152,13 @@ def ssl_verify_mode(ssl)
           end
         end
       end
+
+      private
+
+      def support_ciphers?(ssl_param)
+        Gem::Version.new(Faraday::VERSION) >= Gem::Version.new('2.11.0') &&
+          ssl_param.respond_to?(:ciphers=)
+      end
     end
   end
 end