message: fix: ignore falsy className
diff: @@ -115,7 +115,8 @@ export class Sheet {
  private createAtomClassName(atom: Atom) {
  const { propKey = '', propValue, className, type } = atom
  - if (className || type === 'media-queries') return atom
  + const ignoreType = ['media-queries', 'invalid']
  + if (className || ignoreType.includes(type)) return atom
  const configPrefix = styli.getConfig('prefix')
  const prefix = configPrefix ? configPrefix + '-' : ''
  