Add integer methods

Riot/Managers/KeyValueStorage/MemoryStore.swift

@@ -49,6 +49,10 @@ extension MemoryStore: KeyValueStore {
         setObject(value, forKey: key)
     }
     
+    func set(_ value: Int?, forKey key: KeyValueStoreKey) throws {
+        setObject(value, forKey: key)
+    }
+    
     //  getters
     func data(forKey key: KeyValueStoreKey) throws -> Data? {
         return object(forKey: key) as? Data
@@ -62,6 +66,10 @@ extension MemoryStore: KeyValueStore {
         return object(forKey: key) as? Bool
     }
     
+    func integer(forKey key: KeyValueStoreKey) throws -> Int? {
+        return object(forKey: key) as? Int
+    }
+    
     //  remove
     func removeObject(forKey key: KeyValueStoreKey) {
         map.removeValue(forKey: key)