please update docs with examples for gulp 4

[johnybrownalreadytaken]

all in the title

[filefi]

An example as follow:

const gulp = require('gulp');
const connect = require('gulp-connect')


function serve(){
    const options={
        port:8080, 
        livereload:true,
    };
    connect.server(options);
}


function html(){
    return gulp.src('./src/html/*.html')
        .pipe(gulp.dest('./dist'))
        .pipe(connect.reload()
}

function css(){
    return gulp.src('./src/css/*.css')
        .pipe(gulp.dest('./dist/css'))
        .pipe(connect.reload())
}


function js(){
    return gulp.src('./src/js/*.js')
        .pipe(gulp.dest('./dist/js'))
        .pipe(connect.reload())
}


function watch(){
    gulp.watch('./src/html/*.html',html);
    gulp.watch('./src/css/*.css',css);
    gulp.watch('./src/js/*.js',js);
}


exports.default = gulp.series(html, css, js, gulp.parallel(watch,serve));