fix(nfc): Ensure that Session is dropped when an error causes it to become invalid (#2885)

Co-authored-by: Fabian-Lars <github@fabianlars.de>

plugins/nfc/ios/Sources/NfcPlugin.swift

@@ -149,6 +149,7 @@ class NfcPlugin: Plugin, NFCTagReaderSessionDelegate, NFCNDEFReaderSessionDelega
   func tagReaderSession(_ session: NFCTagReaderSession, didInvalidateWithError error: Error) {
     Logger.error("Tag reader session error \(error)")
     self.session?.invoke.reject("session invalidated with error: \(error)")
+    self.session = nil
   }
 
   func readerSession(_ session: NFCNDEFReaderSession, didDetectNDEFs messages: [NFCNDEFMessage]) {
@@ -200,6 +201,7 @@ class NfcPlugin: Plugin, NFCTagReaderSessionDelegate, NFCNDEFReaderSessionDelega
     } else {
       Logger.error("NDEF reader session error \(error)")
       self.session?.invoke.reject("session invalidated with error: \(error)")
+      self.session = nil
     }
   }