Upgrade async to v3

package-lock.json

@@ -738,13 +738,10 @@
       "dev": true
     },
     "async": {
-      "version": "2.6.2",
-      "resolved": "https://registry.npmjs.org/async/-/async-2.6.2.tgz",
-      "integrity": "sha512-H1qVYh1MYhEEFLsP97cVKqCGo7KfCyTt6uEWqsTBr9SO84oK9Uwbyd/yCW+6rKJLHksBNUVWZDAjfS+Ccx0Bbg==",
-      "dev": true,
-      "requires": {
-        "lodash": "^4.17.11"
-      }
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/async/-/async-3.1.0.tgz",
+      "integrity": "sha512-4vx/aaY6j/j3Lw3fbCHNWP0pPaTCew3F6F3hYyl/tHs/ndmV1q7NW9T5yuJ2XAGwdQrP+6Wu20x06U4APo/iQQ==",
+      "dev": true
     },
     "async-each": {
       "version": "1.0.3",

package.json

@@ -42,7 +42,7 @@
   },
   "devDependencies": {
     "ajv": "6.4.0",
-    "async": "2.6.2",
+    "async": "3.1.0",
     "autoprefixer": "6.3.6",
     "babel-cli": "6.26.0",
     "babel-core": "6.23.1",

webpack.config.js

@@ -81,7 +81,8 @@ module.exports = {
                 include: [
                     path.resolve(__dirname, 'src'),
                     /node_modules[\\/]scratch-[^\\/]+[\\/]src/,
-                    /node_modules[\\/]pify/
+                    /node_modules[\\/]pify/,
+                    /node_modules[\\/]async/
                 ]
             },
             {