Link to our official Gitter chat room

We've deprecated our old IRC channel and now use a Gitter chat room
instead: https://gitter.im/reactphp/reactphp

Author: clue

README.md

@@ -217,12 +217,11 @@ fair chance that it may be relevant to more people. Please do not hesitate to
 file your question as an issue in the relevant component so others can also
 participate.
 
-Check out `#reactphp` on `irc.freenode.net`. You can use the
-[Webchat](http://webchat.freenode.net/?channels=%23reactphp) if you don't
-already use an IRC client. Many of us are available in this channel, so many
-questions get answered in a few minutes to some hours. We also use this channel
+You can also check out our official [Gitter chat room](https://gitter.im/reactphp/reactphp).
+Most of the people involved in this project are available in this chat room, so many
+questions get answered in a few minutes to some hours. We also use this chat room
 to announce all new releases and ongoing development efforts, so consider
-setting up an IRC client and idling in this channel for a little longer.
+staying in this chat room for a little longer.
 
 Also follow [@reactphp](https://twitter.com/reactphp) on Twitter for updates.
 We use this mostly for noteworthy, bigger updates and to keep the community

composer.json

@@ -2,10 +2,11 @@
     "name": "react/react",
     "description": "ReactPHP: Event-driven, non-blocking I/O with PHP.",
     "keywords": ["reactor", "asynchronous", "ReactPHP"],
+    "homepage": "https://reactphp.org/",
     "license": "MIT",
     "support": {
         "issues": "https://github.com/reactphp/react/issues",
-        "irc": "irc://irc.freenode.org/reactphp"
+        "chat": "https://gitter.im/reactphp/reactphp"
     },
     "require": {
         "php": ">=5.3.8",