Merge pull request #205 from terraform-aws-modules/terraform-provider-githubfile-1584537150965422000

[ci skip] Create "LICENSE".

Merge pull request #204 from terraform-aws-modules/terraform-provider-githubfile-1584537150965429000

[ci skip] Create ".pre-commit-config.yaml".

Merge pull request #202 from terraform-aws-modules/terraform-provider-githubfile-1584537120161367000

[ci skip] Create ".gitignore".

Merge pull request #200 from terraform-aws-modules/terraform-provider-githubfile-1584537120161669000

[ci skip] Create ".editorconfig".

Merge pull request #199 from terraform-aws-modules/terraform-provider-githubfile-1584537120162146000

[ci skip] Create "Makefile".

- Update `db_instance` submodule to use same default ca_cert_identifier as the root level module default

* add outputs for the monitoring role arn

* add outputs for the monitoring role arn

* Fixed value in outputs
Co-authored-by: Anton Babenko <anton@antonbabenko.com>

* Add var.performance_insights_retention_period

* Add performance insights retention docs