cleaner build pipe + ES6

The thing is broken tho

package.json

@@ -4,18 +4,22 @@
 	"version": "1.0.0",
 	"license": "MIT",
 	"devDependencies": {
+		"del": "^5.1.0",
 		"gulp": "^4.0.2",
 		"gulp-autoprefixer": "^7.0.1",
 		"gulp-clean-css": "^4.3.0",
 		"gulp-htmlmin": "^5.0.1",
 		"gulp-minify": "^3.1.0",
 		"gulp-rename": "^2.0.0",
+		"gulp-replace": "^1.0.0",
 		"gulp-sass": "^4.1.0"
 	},
 	"scripts": {
 		"build": "gulp"
 	},
 	"browserslist": {
-		"browsers": [ "last 2 versions" ]
+		"browsers": [
+			"last 2 versions"
+		]
 	}
 }