React Setup with Babel, Gulp, and Browserify

gulpfile.babel.js

import gulp from 'gulp';
import browserify from 'browserify';
import source from 'vinyl-source-stream';
import buffer from 'vinyl-buffer';
import eslint from 'gulp-eslint';
import exorcist from 'exorcist';
import browserSync from 'browser-sync';
import watchify from 'watchify';
import babelify from 'babelify';
import uglify from 'gulp-uglify';
import ifElse from 'gulp-if-else';

watchify.args.debug = true;

const sync = browserSync.create();

// Input file.
var bundler = browserify('src/jsx/app.jsx', {
    extensions: ['.js', '.jsx'],
    debug: true
});

// Babel transform
bundler.transform(babelify.configure({
    sourceMapRelative: 'src',
    presets: ["es2015", "react"]
}));

// On updates recompile
bundler.on('update', bundle);

function bundle() {
    return bundler.bundle()
        .on('error', function (err) {
            console.log("=====");
            console.error(err.toString());
            console.log("=====");
            this.emit("end");
        })
        .pipe(exorcist('public/assets/js/bundle.js.map'))
        .pipe(source('bundle.js'))
        .pipe(buffer())
        .pipe(ifElse(process.env.NODE_ENV === 'production', uglify))
        //.pipe(uglify())
        .pipe(gulp.dest('public/assets/js'))
    ;
}

gulp.task('default', ['transpile']);

gulp.task('transpile', ['lint'], () => bundle());

gulp.task('lint', () => {
    return gulp.src([
            'src/**/*.jsx',
            'gulpfile.babel.js'
        ])
        .pipe(eslint())
        .pipe(eslint.format())
    ;
});

gulp.task('serve', ['transpile'], () => sync.init({ server: 'public' }));
gulp.task('js-watch', ['transpile'], () => sync.reload());

gulp.task('watch', ['serve'], () => {
    gulp.watch(['src/**/*.jsx'], ['js-watch']);
    gulp.watch('public/assets/style.css', sync.reload);
    gulp.watch('public/index.html', sync.reload);
});

package.json

{
  "name": "react-app",
  "devDependencies": {
      "babel-core": "^6.7.7",
      "babel-preset-es2015": "^6.6.0",
      "babel-preset-react": "^6.5.0",
      "babel-register": "^6.7.2",
      "babelify": "^7.3.0",
      "browser-sync": "^2.12.5",
      "browserify": "^13.0.0",
      "eslint": "^2.8.0",
      "eslint-plugin-react": "^5.0.1",
      "exorcist": "^0.4.0",
      "gulp": "^3.9.1",
      "gulp-eslint": "^2.0.0",
      "gulp-if-else": "^1.0.3",
      "gulp-uglify": "^1.5.3",
      "react": "^15.0.1",
      "react-dom": "^15.0.1",
      "react-markdown-to-html": "^1.0.11",
      "react-router": "^2.3.0",
      "vinyl-buffer": "^1.0.0",
      "vinyl-source-stream": "^1.1.0",
      "watchify": "^3.7.0"
  }
}