Add PDO as explicit dependency (#123)

Author: renanbr

composer.json

@@ -10,6 +10,7 @@
     ],
     "require": {
         "php": "^7.1.3|^8.0",
+        "ext-pdo_sqlite": "*",
         "ext-sqlite3": "*",
         "illuminate/database": "^5.8 || ^6.0 || ^7.0 || ^8.0 || ^9.0 || ^10.0 || ^11.0",
         "illuminate/support": "^5.8 || ^6.0 || ^7.0 || ^8.0 || ^9.0 || ^10.0 || ^11.0"