XcodeのバージョンあげたらFlutterでビルドできなくなった

#Buildできない
ios系のアプリを作成中。
いざ実行しようとてビルドできなくなった
Queryとtimestamp系のライブラリでエラーか？



```
Launching lib/main.dart on iPhone 8 in debug mode...
Running Xcode build...
Xcode build done.                                            4.8s
Failed to build iOS app
Error output from Xcode build:
↳
    ** BUILD FAILED **


Xcode's output:
↳
    /Users/ts/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.12.11/ios/Classes/CloudFirestorePlugin.m:155:24: error: no visible @interface for 'FIRQuery' declares the selector 'queryWhereField:arrayContainsAny:'
            query = [query queryWhereField:fieldName arrayContainsAny:value];
                     ~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    /Users/ts/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.12.11/ios/Classes/CloudFirestorePlugin.m:157:24: error: no visible @interface for 'FIRQuery' declares the selector 'queryWhereFieldPath:arrayContainsAny:'
            query = [query queryWhereFieldPath:fieldPath arrayContainsAny:value];
                     ~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    /Users/tsi/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.12.11/ios/Classes/CloudFirestorePlugin.m:163:24: error: no visible @interface for 'FIRQuery' declares the selector 'queryWhereField:in:'
            query = [query queryWhereField:fieldName in:value];
                     ~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
    /Users/ts/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.12.11/ios/Classes/CloudFirestorePlugin.m:165:24: error: no visible @interface for 'FIRQuery' declares the selector 'queryWhereFieldPath:in:'
            query = [query queryWhereFieldPath:fieldPath in:value];
                     ~~~~~ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    /Users/ts/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.12.11/ios/Classes/CloudFirestorePlugin.m:764:16: warning: 'timestampsInSnapshotsEnabled' is deprecated [-Wdeprecated-declarations]
          settings.timestampsInSnapshotsEnabled = (bool)call.arguments[@"timestampsInSnapshotsEnabled"];
                   ^
    In file included from /Users/ts/flutter/.pub-cache/hosted/pub.dartlang.org/cloud_firestore-0.12.11/ios/Classes/CloudFirestorePlugin.m:8:
    In file included from /Users/ts/grain-platform-app/sample_app/ios/Pods/Headers/Private/Firebase/Firebase.h:31:
    In file included from /Users/ts/grain-platform-app/sample_app/ios/Pods/Headers/Private/FirebaseFirestore/FirebaseFirestore.h:25:
    /Users/ts/grain-platform-app/sample_app/ios/Pods/Headers/Private/FirebaseFirestore/FIRFirestoreSettings.h:69:20: note: 'timestampsInSnapshotsEnabled' has been explicitly marked deprecated here
        __attribute__((deprecated));
                       ^
    1 warning and 4 errors generated.

Could not build the application for the simulator.
Error launching application on iPhone 8.
```
昨日の夜にX-codeのアップグレード(11.3)したのを思い出す
これが原因か？
(エラーメッセージ中にもそんな感じのことが書いてある)
#Why?
最近、同じように悩んでいる海外の方を発見👀
やっぱりFirestoreのpodが影響してるみたい
https://github.com/FirebaseExtended/flutterfire/issues/1562
#Solution

```pod update Firebase/Firestore```
を実行しFirebaseのアップグレードを行った

→一発でビルドできた！！！
#まとめ
Flutterの日本語記事が少ないのでちょっと書いてみました。
最新のXcodeの対応が追いついていなかったからこんなことになったのかな？
CatallinaにOSが移って間もないですしこういうエラーも多いのかな？
多分この記事はそのうち意味をなくすかな？w
podでこまめにライブラリを管理していきます