[.gemspec] Update activesupport/activerecord

Fixes some Hikari warnings (false positives for our use cases here), but
also matches the versions found in ManageIQ/manageiq

manageiq-appliance_console.gemspec

@@ -20,8 +20,8 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.add_runtime_dependency "activerecord",            ">= 4.2.2"
-  spec.add_runtime_dependency "activesupport",           ">= 4.2.2"
+  spec.add_runtime_dependency "activerecord",            ">= 6.0.3.5", "~> 6.0.0"
+  spec.add_runtime_dependency "activesupport",           ">= 6.0.3.5", "~> 6.0.0"
   spec.add_runtime_dependency "awesome_spawn",           "~> 1.4"
   spec.add_runtime_dependency "bcrypt",                  "~> 3.1.10"
   spec.add_runtime_dependency "bcrypt_pbkdf",            ">= 1.0", "< 2.0"