[Flutter]Firebase登録後にpod installでエラー

はじめに

Firebase登録後にiosディレクトリでpod installコマンドを打ったところ、エラーが起きたので解決法についてまとめておきます。

エラー文

terminal

[!] CocoaPods could not find compatible versions for pod "Firebase/Firestore":
  In Podfile:
    cloud_firestore (from `.symlinks/plugins/cloud_firestore/ios`) was resolved to 4.5.0, which depends on
      Firebase/Firestore (= 10.7.0)

None of your spec sources contain a spec satisfying the dependency: `Firebase/Firestore (= 10.7.0)`.

You have either:
 * out-of-date source repos which you can update with `pod repo update` or with `pod install --repo-update`.
 * mistyped the name or version.
 * not added the source repo that hosts the Podspec to your Podfile.

解決法

iosディレクトリで、

terminal

pod repo update
pod install

参考