Updated http client libs to the latest version as dev dependencies

webmock.gemspec

@@ -19,12 +19,12 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency 'rspec',           '~> 2.8'
   s.add_development_dependency 'httpclient',      '>= 2.2.4'
-  s.add_development_dependency 'patron',          '>= 0.4.17' unless RUBY_PLATFORM =~ /java/
-  s.add_development_dependency 'em-http-request', '>= 1.0.0'
+  s.add_development_dependency 'patron',          '>= 0.4.18' unless RUBY_PLATFORM =~ /java/
+  s.add_development_dependency 'em-http-request', '>= 1.0.2'
   s.add_development_dependency 'em-synchrony',    '>= 1.0.0' if RUBY_VERSION >= "1.9"
   s.add_development_dependency 'curb',            '>= 0.8.0' unless RUBY_PLATFORM =~ /java/
-  s.add_development_dependency 'typhoeus',        '>= 0.3.0' unless RUBY_PLATFORM =~ /java/
-  s.add_development_dependency 'excon',           '>= 0.9.5'
+  s.add_development_dependency 'typhoeus',        '>= 0.3.3' unless RUBY_PLATFORM =~ /java/
+  s.add_development_dependency 'excon',           '>= 0.11.0'
   s.add_development_dependency 'minitest',        '>= 2.2.2'
   s.add_development_dependency 'rdoc',            ((RUBY_VERSION == '1.8.6') ? '<= 3.5.0' : '>3.5.0')