Bump version to 3.0.0.beta4

Author: hsbt

lib/psych/versions.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 module Psych
   # The version is Psych you're using
-  VERSION = '3.0.0.beta3'
+  VERSION = '3.0.0.beta4'
 
   if RUBY_ENGINE == 'jruby'
     DEFAULT_SNAKEYAML_VERSION = '1.18'.freeze

psych.gemspec

@@ -3,10 +3,10 @@
 
 Gem::Specification.new do |s|
   s.name = "psych"
-  s.version = "3.0.0.beta3"
+  s.version = "3.0.0.beta4"
   s.authors = ["Aaron Patterson", "SHIBATA Hiroshi", "Charles Oliver Nutter"]
   s.email = ["aaron@tenderlovemaking.com", "hsbt@ruby-lang.org", "headius@headius.com"]
-  s.date = "2017-06-16"
+  s.date = "2017-11-27"
   s.summary = "Psych is a YAML parser and emitter"
   s.description = <<-DESCRIPTION
 Psych is a YAML parser and emitter. Psych leverages libyaml[http://pyyaml.org/wiki/LibYAML]