React native svg charts border radius from top

import React from 'react'
import { BarChart, Grid } from 'react-native-svg-charts'
import { Defs, LinearGradient, Stop } from "react-native-svg";

class ColorBarExample extends React.PureComponent {

    render() {

        const data = [
            {
                value: 50,
            },
            {
                value: 10,
                svg: {
                    fill: 'rgba(134, 65, 244, 0.5)',
                },
            },
            {
                value: 40,
                svg: {
                    stroke: 'purple',
                    strokeWidth: 2,
                    fill: 'white',
                    strokeDasharray: [ 4, 2 ],
                },
            },
            {
                value: 95,
                svg: {
                    fill: 'url(#gradient)',
                },
            },
            {
                value: 85,
                svg: {
                    fill: 'green',
                },
            },
        ]

        const Gradient = () => (
            <Defs key={'gradient'}>
                <LinearGradient id={'gradient'} x1={'0'} y={'0%'} x2={'100%'} y2={'0%'}>
                    <Stop offset={'0%'} stopColor={'rgb(134, 65, 244)'}/>
                    <Stop offset={'100%'} stopColor={'rgb(66, 194, 244)'}/>
                </LinearGradient>
            </Defs>
        )

        return (
            <BarChart
                style={{ height: 200 }}
                data={data}
                gridMin={0}
                svg={{ fill: 'rgba(134, 65, 244, 0.8)' }}
                yAccessor={({ item }) => item.value}
                contentInset={{ top: 20, bottom: 20 }}
            >
                <Grid/>
                <Gradient/>
            </BarChart>
        )
    }

}

export default ColorBarExample

I am using this code. I need a help to make add border radius at the top of the charts bar. So i also see files of the animated-path.js and other in the svg charts. But didn’t get how to make borders round in the code using d3 shape or anything else. Let me know if get an idea to make it round at the top.