Почему не работает Gulp?

const gulp = require('gulp');
const browserSync = require('browser-sync');
const sass = require('gulp-sass')(require('sass'));
const cleanCSS = require('gulp-clean-css');
const autoprefixer = require('gulp-autoprefixer');
const rename = require("gulp-rename");
const imagemin = require('gulp-imagemin');
const htmlmin = require('gulp-htmlmin');
gulp.task('server', function() {
    browserSync({
        server: {
            baseDir: "dist"
        }
    });
    gulp.watch("src/*.html").on('change', browserSync.reload);
});
gulp.task('styles', function() {
    return gulp.src("src/sass/**/*.+(scss|sass)").pipe(sass({
        outputStyle: 'expanded'
    }).on('error', sass.logError)).pipe(rename({
        suffix: '.min',
        prefix: ''
    })).pipe(autoprefixer()).pipe(cleanCSS({
        compatibility: 'ie8'
    })).pipe(gulp.dest("dist/css")).pipe(browserSync.stream());
});
gulp.task('watch', function() {
    gulp.watch("src/sass/**/*.+(scss|sass|css)", gulp.parallel('styles'));
    gulp.watch("src/*.html").on('change', gulp.parallel('html'));
    gulp.watch("src/js/**/*.js").on('change', gulp.parallel('scripts'));
    gulp.watch("src/fonts/**/*").on('all', gulp.parallel('fonts'));
    gulp.watch("src/icons/**/*").on('all', gulp.parallel('icons'));
    gulp.watch("src/img/**/*").on('all', gulp.parallel('images'));
});
gulp.task('html', function() {
    return gulp.src("src/*.html").pipe(htmlmin({
        collapseWhitespace: true
    })).pipe(gulp.dest("dist/"));
});
gulp.task('scripts', function() {
    return gulp.src("src/js/**/*.js").pipe(gulp.dest("dist/js")).pipe(browserSync.stream());
});
gulp.task('fonts', function() {
    return gulp.src("src/fonts/**/*").pipe(gulp.dest("dist/fonts")).pipe(browserSync.stream());
});
gulp.task('icons', function() {
    return gulp.src("src/icons/**/*").pipe(gulp.dest("dist/icons")).pipe(browserSync.stream());
});
gulp.task('images', function() {
    return gulp.src("src/img/**/*").pipe(imagemin()).pipe(gulp.dest("dist/img")).pipe(browserSync.stream());
});
gulp.task('default', gulp.parallel('watch', 'server', 'styles', 'scripts', 'fonts', 'icons', 'html', 'images'));

{
    "name": "pulse",
    "version": "1.0.0",
    "description": "",
    "main": "gulpfile.js",
    "scripts": {
        "test": "echo "
        Error: no test specified " && exit 1"
    },
    "author": "",
    "license": "ISC",
    "devDependencies": {
        "browser-sync": "^2.26.12",
        "dart-sass": "^1.25.0",
        "gulp": "^4.0.2",
        "gulp-autoprefixer": "^6.1.0",
        "gulp-clean-css": "^4.3.0",
        "gulp-cli": "^2.3.0",
        "gulp-htmlmin": "^5.0.1",
        "gulp-imagemin": "^6.2.0",
        "gulp-rename": "^1.4.0",
        "gulp-sass": "^4.1.1",
        "sass": "^1.42.1"
    },
    "browserslist": ["last 1 version", "> 1%", "maintained node versions", "not dead"]
}