Resolving of not is incorrect

[yehtutlwin]

Currently, the not resolution assumes that it is an array

enjoi/lib/resolver.js

Lines 195 to 201 in abdd705

	resolveNot(schema) {
	Hoek.assert(Util.isArray(schema.not), 'Expected Not to be an array.');
	return this.joi.alternatives().conditional(Joi.alternatives().try(...schema.not.map((schema) => {
	return this.resolve(schema);
	})), { then: this.joi.any().forbidden(), otherwise: this.joi.any() });
	}

However, according to OAS, not is an object, not an array. (https://swagger.io/docs/specification/data-models/oneof-anyof-allof-not/)