Add ToString to RedisValueWithScore

Author: gerzse

src/NRedisStack/CoreCommands/DataTypes/RedisValueWithScore.cs

@@ -28,4 +28,12 @@ public RedisValueWithScore(RedisValue value, double score)
     /// <c>ZADD my-set 5.1 my-value</c>, the score is <c>5.1</c>.
     /// </summary>
     public double Score { get; }
-}
+
+    /// <summary>
+    /// ToString override.
+    /// </summary>
+    public override string ToString()
+    {
+        return $"{Value}: {Score}";
+    }
+}