多层嵌套对象的验证规则不生效

[J1angyue]

Describe the bug

多层嵌套对象的验证规则不生效

Reproduction

比如有以下对象，要验证c属性：
{ a: { b: { c: 'ccc' } } }
规则是这样写吗？不生效啊
{ a: { type: 'object', required: true, fields: { b: { type: 'object', required: true, fields: { c: { type: 'string', required: true } } } } } }

Same issue：yiminghe/async-validator#323

System Info

• Operating System: windows11
• Node version: v16.16.0
• Package manager (npm/yarn/pnpm) and version: 8.11.0

[anncwb]

This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 7 days