fix(deps): update dependency zip-dir to v2 (#2080)

* fix(deps): update dependency zip-dir to v2
* chore: Removed module to manually promisy zip-dir

Co-authored-by: Renovate Bot <bot@renovateapp.com>
Co-authored-by: Luca Greco <lgreco@mozilla.com>

package.json

@@ -86,7 +86,7 @@
     "watchpack": "1.7.5",
     "ws": "7.4.3",
     "yargs": "16.2.0",
-    "zip-dir": "1.0.2"
+    "zip-dir": "2.0.0"
   },
   "devDependencies": {
     "@babel/core": "7.12.16",

src/cmd/build.js

@@ -7,9 +7,9 @@ import parseJSON from 'parse-json';
 import stripBom from 'strip-bom';
 import stripJsonComments from 'strip-json-comments';
 import defaultEventToPromise from 'event-to-promise';
+import zipDir from 'zip-dir';
 
 import defaultSourceWatcher from '../watcher';
-import {zipDir} from '../util/zip-dir';
 import getValidatedManifest, {getManifestId} from '../util/manifest';
 import {prepareArtifactsDir} from '../util/artifacts';
 import {createLogger} from '../util/logger';