Ajout jsonserializable

tests/DbTest.php

@@ -53,6 +53,12 @@ test("model find", function() {
     $row->col1 = "test";
     $res = $row->save();
     expect($res)->toBe(true);
+
+    $json = json_encode($row);
+    expect($json)->toBeJson();
+
+    $obj = json_decode($json);
+    expect($obj->col1)->toBe("test");
 });
 
 test("querybuilder", function() {