message: feat(preset-umi): support config mountElementId
diff: @@ -9,6 +9,7 @@ export function getSchemas(): Record<string, (Joi: Root) => any> {
  favicon: (Joi) => Joi.string(),
  headScripts: (Joi) => Joi.array().items(Joi.alternatives(Joi.string())),
  scripts: (Joi) => Joi.array().items(Joi.alternatives(Joi.string())),
  + mountElementId: (Joi) => Joi.string(),
  npmClient: (Joi) =>
  Joi.string().valid(
  NpmClientEnum.pnpm,
  