Allow newer versions of http_parser until v1.0.0

Author: JamesVorder

Diff for: em-websocket.gemspec

@@ -19,5 +19,5 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
 
   s.add_dependency("eventmachine", ">= 0.12.9")
-  s.add_dependency("http_parser.rb", '>= 0.6.1')
+  s.add_dependency("http_parser.rb", '~> 0')
 end