chore(deps): bump activesupport to patched 7.2+ line

[alexstoick]

Summary

• Bumps activesupport from 7.1.6 to 7.2.3.1 (minor train bump within gemspec >= 6.0.0)
• Closes Dependabot alerts Update activesupport requirement from >= 6.0.0, < 7.1 to >= 6.0.0, < 7.2 #10 (SafeBuffer XSS), Update activesupport requirement from >= 6.0.0, < 7.1 to >= 6.0.0, < 7.2 #11 (ReDoS), Bump rubocop from 1.27.0 to 1.57.0 #12 (DoS)
• Transitive changes: mutex_m dropped, minitest 5.26.1->5.27.0, securerandom 0.3.2->0.4.1

Note

Required resolving with Ruby >= 3.1 since activesupport 7.2+ has required_ruby_version >= 3.1.0. The gemspec has no Ruby version constraint so this is fine for consumers.