Allow up to 9.0

If I set this to only be a patch version, then updating to a higher patch would unexpectedly break this gem. There shouldn't be any breaking changes until the next major version. This also matches the pr to the main upstream repo.

Author: aellispierce

pager_duty-connection.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
 
   gem.add_dependency "faraday", ">= 1.10", "< 3"
-  gem.add_dependency "activesupport", ">= 3.2", "<= 8.0.1"
+  gem.add_dependency "activesupport", ">= 3.2", "<= 9.0"
 
   gem.add_development_dependency "rake"
 end