Aiopytesseract

**changelog**

- improved docstring methods;
- improved tessdata-dir support, due errors like: https://github.com/tesseract-ocr/tesseract/issues/3411.

**changelog**

- better management for timeout 2 - shizacat

**changelog**

- Added args --tessdata-dir 1- shizacat
- Fixed version for cattr due fails on pypy - https://github.com/python-attrs/cattrs/issues/253

**changelog**

- exception TesseractNotFoundError removed.

**changelog**

- code refactored to improve input data validation

**changelog**

- added class models to represent Tesseract Box, Data, OSD and Parameters;
- improved test coverage.