feat: Add rez versioning

lib/versioning/api.ts

@@ -14,6 +14,7 @@ import * as nuget from './nuget';
 import * as pep440 from './pep440';
 import * as poetry from './poetry';
 import * as regex from './regex';
+import * as rez from './rez';
 import * as ruby from './ruby';
 import * as semver from './semver';
 import * as swift from './swift';
@@ -39,6 +40,7 @@ api.set('nuget', nuget.api);
 api.set('pep440', pep440.api);
 api.set('poetry', poetry.api);
 api.set('regex', regex.api);
+api.set('rez', rez.api);
 api.set('ruby', ruby.api);
 api.set('semver', semver.api);
 api.set('swift', swift.api);