Change tasks to async functions

build/concat.js

@@ -7,7 +7,7 @@ import fs from 'fs';
 /**
  * Concatenates third-party JavaScript files.
  */
-export function concatVendors() {
+export async function concatVendors() {
     const filename = 'vendors.js';
     const outfile  = paths.scripts.dest + filename;
     const external = [

build/scripts.js

@@ -6,7 +6,7 @@ import esbuild from 'esbuild';
 /**
  * Bundles and minifies main JavaScript files.
  */
-export function compileScripts() {
+export async function compileScripts() {
     [
         'app.js',
     ].forEach((filename) => {

build/styles.js

@@ -9,7 +9,7 @@ import notification from './utils/notification.js';
 /**
  * Compiles and minifies main Sass files to CSS.
  */
-export function compileStyles() {
+export async function compileStyles() {
     [
         'critical',
         'main',

build/svgs.js

@@ -6,7 +6,7 @@ import mixer from 'svg-mixer';
 /**
  * Generates and transforms SVG spritesheets.
  */
-export function compileSVGs() {
+export async function compileSVGs() {
     [
         {
             includes: [ paths.svgs.src + '*.svg' ],