Bump protocol-http version in gemspec

Author: adampetro

Diff for: protocol-http2.gemspec

@@ -25,5 +25,5 @@ Gem::Specification.new do |spec|
 	spec.required_ruby_version = ">= 3.1"
 
 	spec.add_dependency "protocol-hpack", "~> 1.4"
-	spec.add_dependency "protocol-http", "~> 0.18"
+	spec.add_dependency "protocol-http", "~> 0.47"
 end