报错如下：
Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.parsing.BeanDefinitionParsingException: Configuration problem: @Configuration class ‘BugsnagClient‘ may not be final. Remove the final modifier to continue.
Offending resource: class path resource [com/rollong/chinatower/server/exception/bugsnag/BugsnagClient.class]
代码中应该：
请在fun前加上open
