feat: add flags to json schema #171

Job	Run time
test-against-sample-dbt-files (1.5, dbt_project)	13s
validate_plusless_properties	7s
test-against-sample-dbt-files (1.5, packages)	18s
validate-json-schemas	26s
test-against-sample-dbt-files (1.5, selectors)	7s
test-against-sample-dbt-files (1.5, dbt_yml_files)	10s
test-against-sample-dbt-files (1.5, dbt_cloud)	12s
test-against-sample-dbt-files (1.6, dbt_project)	17s
test-against-sample-dbt-files (1.6, packages)	7s
test-against-sample-dbt-files (1.6, selectors)	9s
test-against-sample-dbt-files (1.6, dbt_yml_files)	7s
test-against-sample-dbt-files (1.6, dependencies)	13s
test-against-sample-dbt-files (1.6, dbt_cloud)	9s
test-against-sample-dbt-files (1.7, dbt_project)	10s
test-against-sample-dbt-files (1.7, packages)	12s
test-against-sample-dbt-files (1.7, selectors)	7s
test-against-sample-dbt-files (1.7, dbt_yml_files)	14s
test-against-sample-dbt-files (1.7, dependencies)	11s
test-against-sample-dbt-files (1.7, dbt_cloud)	11s
test-against-sample-dbt-files (latest, dbt_project)	9s
test-against-sample-dbt-files (latest, packages)	7s
test-against-sample-dbt-files (latest, selectors)	12s
test-against-sample-dbt-files (latest, dbt_yml_files)	13s
test-against-sample-dbt-files (latest, dependencies)	11s
test-against-sample-dbt-files (latest, dbt_cloud)	7s
	4m 39s

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