Release 4.20.0

• Changed: upgrade default version for gitlab runner to 13.4.0 (#261)
• Added: allow additional gitlab-runner egress rules (257) by @mhulscher
• Added: Variable to disable EC2 detailed monitoring (#260) by @jessedobbelaere
• Added: KMS alias to kms key (#255) by @Michenux
• Changed: deprecated of peak settings (#242)
• Fix: Bug fix on instance profile variable not passing correctly (#247) by @arthurbdiniz
• Added: IAM policies for runner as variable, (#241) by @kayman-mk