SpringBoot2 + Swagger2 + Security 接口地址访问异常：Unable to render this definition

在对接中遇到的问题记录一下

异常信息：
Unable to render this definition
The provided definition does not specify a valid version field.

Please indicate a valid Swagger or OpenAPI version field. Supported version fields are swagger: "2.0" and those that match openapi: 3.0.n (for example, openapi: 3.0.0).

异常解决:
// 无需登陆，即匿名用户可访问
.antMatchers("/swagger-ui.html").anonymous()
.antMatchers("/swagger-resources/").anonymous()
.antMatchers("/webjars/").anonymous()
.antMatchers("/v2/api-docs/**").anonymous() // 添加此配置