Add integer methods

Riot/Managers/KeyValueStorage/KeychainStore.swift

@@ -76,6 +76,15 @@ extension KeychainStore: KeyValueStore {
         try keychain.set(value, key: key)
     }
     
+    func set(_ value: Int?, forKey key: KeyValueStoreKey) throws {
+        guard let value = value else {
+            try removeObject(forKey: key)
+            return
+        }
+        
+        try keychain.set(String(value), key: key)
+    }
+    
     //  getters
     func data(forKey key: KeyValueStoreKey) throws -> Data? {
         return try keychain.getData(key)
@@ -89,6 +98,10 @@ extension KeychainStore: KeyValueStore {
         return try keychain.getBool(key)
     }
     
+    func integer(forKey key: KeyValueStoreKey) throws -> Int? {
+        return try Int(keychain.getString(key) ?? "")
+    }
+    
     //  remove
     func removeObject(forKey key: KeyValueStoreKey) throws {
         try keychain.remove(key)