yarn add firebase给出以下unmet peer dependency警告。 Firebase文档没有提到需要任何依赖关系：请参见here，它可以与npm install --save firebase一起使用。我想念什么？
warning "firebase > @firebase/database@0.4.1" has unmet peer dependency "@firebase/app-types@0.x".
warning "firebase > @firebase/firestore@1.3.1" has unmet peer dependency "@firebase/app-types@0.x".
warning "firebase > @firebase/functions@0.4.7" has unmet peer dependency "@firebase/app-types@0.x".
warning "firebase > @firebase/messaging@0.3.20" has unmet peer dependency "@firebase/app-types@0.x".
warning "firebase > @firebase/performance@0.2.2" has unmet peer dependency "@firebase/app-types@0.x".
warning "firebase > @firebase/storage@0.2.16" has unmet peer dependency "@firebase/app-types@0.x".
warning "firebase > @firebase/auth > @firebase/auth-types@0.7.0" has unmet peer dependency "@firebase/app-types@0.x".
warning "firebase > @firebase/auth > @firebase/auth-types@0.7.0" has unmet peer dependency "@firebase/util@0.x".
warning "firebase > @firebase/database > @firebase/database-types@0.4.0" has unmet peer dependency "@firebase/app-types@0.x".
warning "firebase > @firebase/firestore > @firebase/firestore-types@1.3.0" has unmet peer dependency "@firebase/app-types@0.x".
warning "firebase > @firebase/functions > @firebase/messaging-types@0.2.11" has unmet peer dependency "@firebase/app-types@0.x".
warning "firebase > @firebase/performance > @firebase/installations@0.1.1" has unmet peer dependency "@firebase/app-types@0.x".
warning "firebase > @firebase/storage > @firebase/storage-types@0.2.11" has unmet peer dependency "@firebase/app-types@0.x".
warning "firebase > @firebase/storage > @firebase/storage-types@0.2.11" has unmet peer dependency "@firebase/util@0.x".
warning "firebase > @firebase/performance > @firebase/installations > @firebase/installations-types@0.1.0" has unmet peer dependency "@firebase/app-types@0.x".