Bump composer/composer from 2.0.13 to 2.1.9

Bumps [composer/composer](https://github.com/composer/composer) from 2.0.13 to 2.1.9.
- [Release notes](https://github.com/composer/composer/releases)
- [Changelog](https://github.com/composer/composer/blob/master/CHANGELOG.md)
- [Commits](composer/composer@2.0.13...2.1.9)

---
updated-dependencies:
- dependency-name: composer/composer
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

composer.json

@@ -25,7 +25,7 @@
     "prefer-stable": true,
     "require": {
         "php": ">=7.0",
-        "composer/composer": "2.0.13",
+        "composer/composer": "2.1.9",
         "composer/semver": "3.2.4",
         "easyengine/admin-tools-command": "v1.1.0",
         "easyengine/auth-command": "v1.1.0",