StrokeColor added to mutator and Mutator example in LineChart

[PeerConradi]

Example added for DataPointMutator inside ApexPointSeries and added the ability to change the StrokeColor (not just the FillColor).

Added a small demo if this to the documentation.

<ApexPointSeries TItem="Order"
                         Items="Orders"
                         Name="Gross Value"
                         
                         SeriesType="SeriesType.Line"
                         XValue="@(e => e.OrderDate)"
                         YValue="@(e => e.GrossValue)"
                         DataPointMutator="MutateDataPoint"
                         OrderByDescending="e=>e.Y" />

private void MutateDataPoint(DataPoint<Order> point)
    {
        var max = Orders.Max(e => e.GrossValue);

        if (point.Items.Any(n => n.GrossValue == max))
        {
            point.FillColor = "#FF0000";
            point.StrokeColor= "#00FFFF";
        }
    }

[joadan]

Thank you