fix: (breaking) uuid format is for plain UUIDs, not UUIDs in URNs

Refs: https://json-schema.org/draft/2020-12/json-schema-validation.html#rfc.section.7.3.5
Refs: json-schema-org/json-schema-spec#715

Author: ChALkeR

src/formats.js

@@ -142,9 +142,8 @@ const core = {
   // relative JSON-pointer: http://tools.ietf.org/html/draft-luff-relative-json-pointer-00
   'relative-json-pointer': /^(?:0|[1-9][0-9]*)(?:|#|\/(?:[^~]|~0|~1)*)$/,
 
-  // matches ajv + unwrap nested group
   // uuid: http://tools.ietf.org/html/rfc4122
-  uuid: /^(?:urn:uuid:)?[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i,
+  uuid: /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i,
 
   // length restriction is an arbitrary safeguard
   // first regex checks if this a week duration (can't be combined with others)

test/json-schema.js

@@ -97,6 +97,7 @@ const unsupported = new Set([
   'rules/format.json/whitelisted unknown format is valid',
   'rules/format.json/validation of URL strings',
   'rules/format.json/validation of JSON-pointer URI fragment strings',
+  'rules/format.json/validation of uuid strings', // URI form not valid per new spec for { format: 'uuid' }
   'issues/33_json_schema_latest.json/use latest json schema as v4 (#33)',
 
   // draft-next only, object contains