feat: run tests on Rails 7

Author: bibendi

Appraisals

@@ -9,3 +9,7 @@ end
 appraise "rails-6" do
   gem "rails", "~> 6.0"
 end
+
+appraise "rails-7" do
+  gem "rails", "~> 7.0.0.alpha2"
+end

activerecord-postgres_enum.gemspec

@@ -31,7 +31,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
   spec.required_ruby_version = ">= 2.5"
 
-  spec.add_runtime_dependency "activerecord", ">= 5", "< 6.2"
+  spec.add_runtime_dependency "activerecord", ">= 5"
   spec.add_runtime_dependency "pg"
 
   spec.add_development_dependency "appraisal", "~> 2.2"