EvalAsync takes CurrentCulture to get FormulaValue

We found out that EvalAsync function takes a Current Culture when getting a FormulaValue result even though we don't pass CultureInfo to the ParserOptions.

Attached unit tests to reproduce

        [Fact]
        public async Task test()
        {
            // Setup
            CultureInfo culture = new CultureInfo("es-ES");
            CultureInfo.CurrentCulture = culture;
            var parserOptions = new ParserOptions() { AllowsSideEffects = true, NumberIsFloat = true};
            RecalcEngine recalcEngine = new RecalcEngine();

            var check = recalcEngine.Check("Float(\"4,99\")", parserOptions);
            var run = check.GetEvaluator();
            var result = await run.EvalAsync(CancellationToken.None);
            // Look at Result Value => Seems like 4.99
            Assert.Equal(4.99, result.ToObject());
        }

        [Fact]
        public async Task test2()
        {
            // Setup
            CultureInfo culture = new CultureInfo("en-US");
            CultureInfo.CurrentCulture = culture;
            var parserOptions = new ParserOptions() { AllowsSideEffects = true, NumberIsFloat = true };
            RecalcEngine recalcEngine = new RecalcEngine();

            var check = recalcEngine.Check("Float(\"4,99\")", parserOptions);
            var run = check.GetEvaluator();
            var result = await run.EvalAsync(CancellationToken.None);
            // Look at Result Value => Seems like 499
            Assert.Equal((double)499, result.ToObject());
        }