我已经将我的 flutter 包更新到最新版本，现在 IOS 不再工作了。
当我尝试更新 Pod 时，它显示此错误：
[!] CocoaPods could not find compatible versions for pod "Firebase/CoreOnly":
In Podfile:
cloud_firestore (from `.symlinks/plugins/cloud_firestore/ios`) was resolved to 0.0.1, which depends on
Firebase/Firestore (~> 6.0) was resolved to 6.0.0, which depends on
Firebase/CoreOnly (= 6.0.0)
cloud_functions (from `.symlinks/plugins/cloud_functions/ios`) was resolved to 0.0.1, which depends on
Firebase/Functions (~> 5.18) was resolved to 5.18.0, which depends on
Firebase/CoreOnly (= 5.18.0)
这是我的 pubspec.yaml（与 Firebase 相关）：
firebase_core: "^0.4.0"
firebase_auth: "^0.11.0"
firebase_analytics: "^3.0.0"
cloud_firestore: "^0.11.0+1"
cloud_functions: "^0.3.0" …