Python-amazon-paapi

**Major changes:**
* Changed to MIT License.

**Bug fixes:**
* Solved import bug.

**New features:**
* Added search_products and get_variations methods.
* Removed Amazon API requests limit for all methods.
* Created AmazonException for better exception handling.
* Added asynchronous requests compatibility.

**Major changes:**
* Added parent_ASIN to product instance.

**Minor changes:**
* Cleaned code for more consistent style.
* Updated docstrings for all methods.
* Updated project structure.

**Major changes:**
* Added get_product for single requests.

**New features:**
* Removed Amazon 10 products limitation.

**Major changes:**
* Changed get_product method name to get_products.
* Improved exception handling.

**Minor changes:**
* Added type hints.
* Solved bug with images exception.
* Updated documentation.

**Major changes:**
* Improved exception handling.