Update civicrm/composer-downloads-plugin requirement from ^2.1 || ^3.…

…0 to ^2.1 || ^3.0 || ^4.0

---
updated-dependencies:
- dependency-name: civicrm/composer-downloads-plugin
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -13,7 +13,7 @@
   },
   "require-dev": {
     "ext-zip": "*",
-    "civicrm/composer-downloads-plugin": "^2.1 || ^3.0",
+    "civicrm/composer-downloads-plugin": "^2.1 || ^3.0 || ^4.0",
     "dealerdirect/phpcodesniffer-composer-installer": "^0.7.1 || ^1.0.0",
     "mikey179/vfsstream": "^1.6",
     "php-parallel-lint/php-parallel-lint": "^1.2",