gulpfile.js

var gulp = require('gulp');
var concat = require('gulp-concat');

gulp.task('concat-js', function() {
	return gulp.src([
			'./src/js/wysiwyg.js',
			'./src/js/**/!(wysiwyg)*.js'
		])
		.pipe(concat('wysiwyg.js'))
		.pipe(gulp.dest('./dist'));
});