Implement usage of the dynamic `"postgraphile:validationRules"` hook

[enisdenjo]

graphql-sse/src/index.ts

Lines 104 to 120 in 1879046

	// TODO: implement if necessary
	// // You are strongly encouraged to use
	// // `postgraphile:validationRules:static` if possible - you should
	// // only use this one if you need access to variables.
	// const moreValidationRules = pluginHook('postgraphile:validationRules', [], {
	// options,
	// req,
	// res,
	// variables: variableValues,
	// operationName: operationName,
	// });
	// if (moreValidationRules.length) {
	// const moreValidationErrors = validate(schema, document, moreValidationRules);
	// if (moreValidationErrors.length) {
	// return moreValidationErrors;
	// }
	// }