npm WARNajv-keywords@3.2.0 requires a peer of ajv@^6.0.0 but none is installed.

npm WARNajv-keywords@3.2.0 requires a peer of ajv@^6.0.0 but none is installed. You must install peer dependencies yourself.

毛主席说：“缺什么，补什么。” 缺了一个依赖，装上即可。

npm install ajv@6.0.0