improve json-schema file

[chaseholdren]

This PR changes some types so the generated schema.json file is more accurate. Before this change, schema.json had DependencyType could be an object. I tested this by running pnpm run build:json-schema and then uploaded the result as a gist, which I could reference from another project.

[JamieMason]

very nice @chaseholdren, thanks a lot!

[evaliyev]

Is this PR related to #207?

[JamieMason]

This line should address that @evaliyev, I've not had chance to look deeper into what the other changes are yet but @chaseholdren may comment on those in the meantime to give us some more context.

syncpack/src/config/types.ts

Lines 184 to 186 in 066d2ed

	export interface JsonSchema extends RcConfig {
	$schema?: string;
	}