fix store issue

Author: Velin92

MatrixSDK/Data/Store/MXFileStore/MXFileStore.m

@@ -29,7 +29,7 @@
 #import "MatrixSDKSwiftHeader.h"
 #import "MXFileRoomSummaryStore.h"
 
-static NSUInteger const kMXFileVersion = 82;    // Check getUnreadRoomFromStore if you update this value. Delete this comment after
+static NSUInteger const kMXFileVersion = 83;    // Check getUnreadRoomFromStore if you update this value. Delete this comment after
 
 static NSString *const kMXFileStoreFolder = @"MXFileStore";
 static NSString *const kMXFileStoreMedaDataFile = @"MXFileStore";

MatrixSDK/Utils/MXTools.m

@@ -140,7 +140,9 @@ + (void)initialize
             @(MXEventTypePollResponse) : kMXEventTypeStringPollResponseMSC3381,
             @(MXEventTypePollEnd) : kMXEventTypeStringPollEndMSC3381,
             @(MXEventTypeBeaconInfo) : kMXEventTypeStringBeaconInfoMSC3672,
-            @(MXEventTypeBeacon) : kMXEventTypeStringBeaconMSC3672
+            @(MXEventTypeBeacon) : kMXEventTypeStringBeaconMSC3672,
+            
+            @(MXEventTypeRoomRetention): kMXEventTypeStringRoomRetention
         };
 
         eventTypeMapStringToEnum = @{