NPM RUN DEVELOPMENT GENERATE ERROR

after upgrading laravel mix to "laravel-mix": "^6.0.9", npm run dev no longer works. Here is the error that get's printed:

[webpack-cli] TypeError: Promise.allSettled is not a function
    at Dispatcher.fire (C:\laragon\www\nigeriaschoolsinfo\node_modules\laravel-mix\src\Dispatcher.js:34:24)
    at Mix.dispatch (C:\laragon\www\nigeriaschoolsinfo\node_modules\laravel-mix\src\Mix.js:108:32)
    at module.exports (C:\laragon\www\nigeriaschoolsinfo\node_modules\laravel-mix\setup\webpack.config.js:5:15)
    at C:\laragon\www\nigeriaschoolsinfo\node_modules\webpack-cli\lib\webpack-cli.js:792:43
    at Array.map (<anonymous>)
    at evaluateConfig (C:\laragon\www\nigeriaschoolsinfo\node_modules\webpack-cli\lib\webpack-cli.js:784:24)
    at C:\laragon\www\nigeriaschoolsinfo\node_modules\webpack-cli\lib\webpack-cli.js:825:28
    at async Promise.all (index 0)
    at async WebpackCLI.resolveConfig (C:\laragon\www\nigeriaschoolsinfo\node_modules\webpack-cli\lib\webpack-cli.js:814:38)
    at async WebpackCLI.createCompiler (C:\laragon\www\nigeriaschoolsinfo\node_modules\webpack-cli\lib\webpack-cli.js:1157:22)

my package.json configuration

    "scripts": {
        "development": "mix",
        "watch": "mix watch",
        "watch-poll": "mix watch -- --watch-options-poll=1000",
        "hot": "mix watch --hot",
        "production": "mix --production"
    },