Bump rack-mount dep to 0.5.3

actionpack/actionpack.gemspec

@@ -21,6 +21,6 @@
   s.add_dependency('activemodel',   '= 3.0.0.beta1')
   s.add_dependency('rack',          '~> 1.1.0')
   s.add_dependency('rack-test',     '~> 0.5.0')
-  s.add_dependency('rack-mount',    '~> 0.4.0')
+  s.add_dependency('rack-mount',    '~> 0.5.3')
   s.add_dependency('erubis',        '~> 2.6.5')
 end

rails3b.gemspec

 Gem::Specification.new do |s|
   s.platform    = Gem::Platform::RUBY
   s.name        = 'rails3b'
-  s.version     = '3.0.0'
+  s.version     = '3.0.1'
   s.summary     = 'Just the Rails 3 beta dependencies. Works around prerelease RubyGems bug.'
   s.description = 'My kingdom for working dependencies.'
   s.required_ruby_version = '>= 1.8.7'
@@ -16,7 +16,7 @@
   s.add_dependency('text-format', '~> 1.0.0')
   s.add_dependency('rack',          '~> 1.1.0')
   s.add_dependency('rack-test',     '~> 0.5.0')
-  s.add_dependency('rack-mount',    '~> 0.4.0')
+  s.add_dependency('rack-mount',    '~> 0.5.3')
   s.add_dependency('erubis',        '~> 2.6.5')
   s.add_dependency('i18n',            '~> 0.3.0')
   s.add_dependency('tzinfo',          '~> 0.3.16')