catch NotImplementedError for older Ruby

Author: helenye-stripe

lib/stripe/stripe_configuration.rb

@@ -45,7 +45,12 @@ def self.client_init(config_opts)
       imported_options = USER_CONFIGURABLE_GLOBAL_OPTIONS - StripeClient::CLIENT_OPTIONS
       client_config = StripeConfiguration.setup do |instance|
         imported_options.each do |key|
-          instance.public_send("#{key}=", global_config.public_send(key)) if global_config.respond_to?(key)
+          begin
+            instance.public_send("#{key}=", global_config.public_send(key)) if global_config.respond_to?(key)
+          rescue NotImplementedError => e
+            # In Ruby <= 2.5, we can't set write_timeout on Net::HTTP, log an error and continue
+            Util.log_error("Failed to set #{key} on client configuration: #{e}")
+          end
         end
       end
       client_config.reverse_duplicate_merge(config_opts)