title: Firestore: Use of unresolved identifier 'Firestore'
body: <p>I wanted to implement the Firestore Database. In my Podfile I added <code>pod 'Firebase/Firestore'</code> and did <code>pod install</code>. When <code>trying to use let db = Firestore.firestore()</code>I get the Error:<code>Use of unresolved identifier 'Firestore'</code>. I have tried pod update too and it also says <code>Using FirebaseFirestore (0.12.2)</code> but it soll doesn't work. What should I do?</p>