bumping version to 0.22.4

happy eyeballs v2: fix bug of connection merging with itself

Closes #227

See merge request os85/httpx!240

doc/release_notes/0_22_4.md

@@ -0,0 +1,6 @@
+# 0.22.4
+
+## Bugfixes
+
+* fix happy eyeballs v2 bug where, once the first connection would be established, the remaining one would still end up in the coalescing loop, thereby closing itself via the `:tcp_open` callback.
+* fix for faraday plugin parallel mode, where it'd hang if no requests would be made in the parallel block (@catlee)

lib/httpx/pool.rb

@@ -147,9 +147,11 @@ module HTTPX
       end
 
       new_connection.once(:tcp_open) do |new_conn|
+        if new_conn != connection
           new_conn.merge(connection)
           connection.force_reset
         end
+      end
       new_connection.once(:connect_error) do |err|
         if connection.connecting?
           # main connection has the requests

lib/httpx/transcoder.rb

@@ -73,7 +73,7 @@ module HTTPX
     end
 
     def params_hash_has_key?(hash, key)
-      return false if /\[\]/.match?(key)
+      return false if key.include?("[]")
 
       key.split(/[\[\]]+/).inject(hash) do |h, part|
         next h if part == ""

lib/httpx/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module HTTPX
-  VERSION = "0.22.3"
+  VERSION = "0.22.4"
 end