Merge pull request #581 from janko/ruby-2-7-compatibility

Ruby 2.7 compatibility

Author: ixti

lib/http/connection.rb

@@ -93,7 +93,7 @@ def readpartial(size = BUFFER_SIZE)
       chunk    = @parser.read(size)
       finish_response if finished
 
-      chunk.to_s
+      chunk || "".b
     end
 
     # Reads data from socket up until headers are loaded

lib/http/features/auto_deflate.rb

@@ -10,7 +10,7 @@ module Features
     class AutoDeflate < Feature
       attr_reader :method
 
-      def initialize(*)
+      def initialize(**)
         super
 
         @method = @opts.key?(:method) ? @opts[:method].to_s : "gzip"

lib/http/options.rb

@@ -111,7 +111,7 @@ def features=(features)
                     unless (feature = self.class.available_features[name])
                       argument_error! "Unsupported feature: #{name}"
                     end
-                    feature.new(opts_or_feature)
+                    feature.new(**opts_or_feature)
                   end
       end
     end