* refractor the to_squad data class
* fix the validation label
* refractor the to_squad data class
* fix the validation label
* add the test for the to_label object function
* fix the tests for to_label_objects
* move all the test related to squad data to one file
* remove unused imports
* revert tiny_augmented.json
Co-authored-by: ZanSara <sarazanzo94@gmail.com>
