switched from http-2 to http-2-next

httpx.gemspec

@@ -20,7 +20,7 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
   gem.version       = HTTPX::VERSION
 
-  gem.add_runtime_dependency "http-2",              ">= 0.9.0"
+  gem.add_runtime_dependency "http-2-next",              ">= 0.1.1"
   gem.add_runtime_dependency "timers"
   gem.add_development_dependency "http-form_data",  ">= 2.0.0", "< 3"
   gem.add_development_dependency "http-cookie",     "~> 1.0"

lib/httpx/connection/http2.rb

@@ -1,29 +1,13 @@
 # frozen_string_literal: true
 
 require "io/wait"
-require "http/2"
+require "http/2/next"
 
 module HTTPX
   class Connection::HTTP2
     include Callbacks
     include Loggable
 
-    if HTTP2::VERSION < "0.10.1"
-      module HTTP2Extensions
-        refine ::HTTP2::Client do
-          def receive(*)
-            send_connection_preface
-            super
-          end
-
-          def <<(*args)
-            receive(*args)
-          end
-        end
-      end
-      using HTTP2Extensions
-    end
-
     Error = Class.new(Error) do
       def initialize(id, code)
         super("stream #{id} closed with error: #{code}")
@@ -116,7 +100,7 @@ module HTTPX
     end
 
     def init_connection
-      @connection = HTTP2::Client.new(@options.http2_settings)
+      @connection = HTTP2Next::Client.new(@options.http2_settings)
       @connection.on(:frame, &method(:on_frame))
       @connection.on(:frame_sent, &method(:on_frame_sent))
       @connection.on(:frame_received, &method(:on_frame_received))

lib/httpx/plugins/h2c.rb

@@ -25,7 +25,7 @@ module HTTPX
           upgrade_request.headers.add("connection", "upgrade")
           upgrade_request.headers.add("connection", "http2-settings")
           upgrade_request.headers["upgrade"] = "h2c"
-          upgrade_request.headers["http2-settings"] = HTTP2::Client.settings_header(upgrade_request.options.http2_settings)
+          upgrade_request.headers["http2-settings"] = HTTP2Next::Client.settings_header(upgrade_request.options.http2_settings)
           wrap { send_requests(*upgrade_request, h2c_options).first }
 
           responses = send_requests(*requests, h2c_options)
@@ -111,7 +111,7 @@ module HTTPX
       end
 
       module FrameBuilder
-        include HTTP2
+        include HTTP2Next
 
         module_function