Update http dependency to 5.0

Author: jgarber623

indieweb-endpoints.gemspec

@@ -23,7 +23,7 @@ Gem::Specification.new do |spec|
   spec.metadata['changelog_uri']   = "#{spec.homepage}/blob/v#{spec.version}/CHANGELOG.md"
 
   spec.add_runtime_dependency 'addressable', '~> 2.7'
-  spec.add_runtime_dependency 'http', '~> 4.4'
+  spec.add_runtime_dependency 'http', '~> 5.0'
   spec.add_runtime_dependency 'link-header-parser', '~> 3.0'
   spec.add_runtime_dependency 'nokogiri', '~> 1.11'
 end