Update chicken.rb

packages/chicken.rb

@@ -3,22 +3,9 @@ require 'package'
 class Chicken < Package
   description 'CHICKEN is practical and portable scheme system.'
   homepage 'https://code.call-cc.org/'
-  version '4.12.0'
-  source_url 'https://code.call-cc.org/releases/4.12.0/chicken-4.12.0.tar.gz'
-  source_sha256 '605ace459bc66e8c5f82abb03d9b1c9ca36f1c2295931d244d03629a947a6989'
-
-  binary_url ({
-    aarch64: 'https://dl.bintray.com/chromebrew/chromebrew/chicken-4.12.0-chromeos-armv7l.tar.xz',
-     armv7l: 'https://dl.bintray.com/chromebrew/chromebrew/chicken-4.12.0-chromeos-armv7l.tar.xz',
-       i686: 'https://dl.bintray.com/chromebrew/chromebrew/chicken-4.12.0-chromeos-i686.tar.xz',
-     x86_64: 'https://dl.bintray.com/chromebrew/chromebrew/chicken-4.12.0-chromeos-x86_64.tar.xz',
-  })
-  binary_sha256 ({
-    aarch64: 'f7289dd5902762bbf0b4834a2167834d9ca09f688a1c6676dd5b9f27421beb1b',
-     armv7l: 'f7289dd5902762bbf0b4834a2167834d9ca09f688a1c6676dd5b9f27421beb1b',
-       i686: 'db922dce8a1ac59c223b2251e202add59b7d72e3c36bca5daf82d6e1943f4d64',
-     x86_64: '2cc8acf02ac5d91c059664650a1886a67ec0ec4ce139d98f30560598d4fa165c',
-  })
+  version '4.13.0'
+  source_url 'https://code.call-cc.org/releases/4.13.0/chicken-4.13.0.tar.gz'
+  source_sha256 'add549619a31363d6608b39e0cf0e68b9d5e6ff2a719b5691ddeba57229c6c43'
 
   def self.build
     system "make", "PLATFORM=linux"