Feature request: Log failed results on higher level

[walles]

Could you log failed validations on warning level, and keep non-failed validations at debug?

If you have lots of successes and only a few failures this would make the output a lot easier to read.

openapi-cop/src/app.ts

Lines 157 to 160 in fbc58eb

	debug(
	`Validation results [${oasRequest.method} ${oasRequest.path}] ` +
	JSON.stringify(validationResults, null, 2),
	);