README: add information about adding permission via CLI

PHPCSStandards · Dec 29, 2021 · d3afb2a · d3afb2a
1 parent 1f79444
commit d3afb2a
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/README.md b/README.md
@@ -38,6 +38,11 @@ When permission has been granted, the following snippet will automatically be ad
 }
 ```
 
+When using Composer < 2.2, you can add the permission flag ahead of the upgrade to Composer 2.2, by running:
+```bash
+composer config allow-plugins.dealerdirect/phpcodesniffer-composer-installer true
+```
+
 That's it.
 
 ### Compatibility