4.9.0

• Add --ensure-ignore-notes (Eli Block)
• Add check for user input in ERB.new (Matt Hickman)
• Add check for CVE-2020-8166 (Jamie Finnigan)
• Always scan environment.rb
• Avoid warning when safe_yaml is used via YAML.load(..., safe: true)
• Do not warn about mass assignment with params.permit!.slice
• Ignore params.permit! in path helpers
• Treat Dir.glob as safe source of values in guards
• Remove whitelist/blacklist language, add clarifications
• Add "full call" information to call index results
• Updated Slim dependency (Jeremiah Church)