Laravel6でVueを使おうとnpm run watchをするとエラーが出る

Vue初心者です。

Laravel6でVueを触ろうと思い、npm installをして進めて行くとnpm run watchでこのエラーに遭遇しました。

Uncaught Error: Module build failed (from ./node_modules/css-loader/index.js):
ModuleBuildError: Module build failed (from ./node_modules/sass-loader/dist/cjs.js):
ValidationError: Invalid options object. Sass Loader has been initialized using an options object that does not match the API schema.
 - options has an unknown property 'outputStyle'. These properties are valid:
   object { implementation?, sassOptions?, prependData?, sourceMap?, webpackImporter? }

確認したこと、疑問
・https://github.com/webpack-contrib/sass-loader/issues/530　npm rebuild node-sass
・https://qiita.com/jigengineer/items/2b15797b850179cb8be0　npm ci

packge.json
{
    "private": true,
    "scripts": {
        "dev": "npm run development",
        "development": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
        "watch": "npm run development -- --watch",
        "watch-poll": "npm run watch -- --watch-poll",
        "hot": "cross-env NODE_ENV=development node_modules/webpack-dev-server/bin/webpack-dev-server.js --inline --hot --config=node_modules/laravel-mix/setup/webpack.config.js",
        "prod": "npm run production",
        "production": "cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --no-progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
    },
    "devDependencies": {
        "axios": "^0.19",
        "bootstrap": "^4.0.0",
        "cross-env": "^5.1",
        "fibers": "^4.0.2",
        "jquery": "^3.2",
        "laravel-mix": "^4.0.7",
        "lodash": "^4.17.13",
        "popper.js": "^1.12",
        "resolve-url-loader": "^2.3.1",
        "sass": "^1.25.0",
        "sass-loader": "^8.0.2",
        "vue": "^2.5.17",
        "vue-template-compiler": "^2.6.10",
        "webpack": "^4.41.6"
    }
}