Add PostgreSQL Support (#3)

Reviewed-on: #3

src/Parameters.php

@@ -68,7 +68,7 @@ class Parameters
     {
         switch (Configuration::$mode) {
             case Mode::PgSQL:
-                return [$paramName => "ARRAY['" . implode("','", $fieldNames) . "']"];
+                return [$paramName => "{" . implode(",", $fieldNames) . "}"];
             case Mode::SQLite:
                 $it = [];
                 $idx = 0;