chore: add ext for suggest

Author: kenjis

composer.json

@@ -27,7 +27,14 @@
         "rector/rector": "0.13.9"
     },
     "suggest": {
-        "ext-fileinfo": "Improves mime type detection for files"
+        "ext-fileinfo": "Improves mime type detection for files",
+        "ext-imagick": "If you use ImageMagickHandler",
+        "ext-simplexml": "If you format XML",
+        "ext-mysqli": "If you use MySQL",
+        "ext-oci8": "If you use Oracle Database",
+        "ext-pgsql": "If you use PostgreSQL",
+        "ext-sqlsrv": "If you use SQL Server",
+        "ext-sqlite3": "If you use SQLite3"
     },
     "config": {
         "optimize-autoloader": true,