JSONStorage ignore custom JSON libraries like ujson

[Paolo97Gll]

Context

• Operating System: Ubuntu 20.04.3 LTS
• Python Version: Python 3.9.7
• aiogram version: 2.15
• aiohttp version: 3.7.4.post0
• uvloop version (if installed): 0.16.0

Expected Behavior

When using JSONStorage, JSONStorage.read and JSONStorage.write should parse JSON with the custom compatible installed library. So, if I choose to install ujson, I expect that these two methods will use ujson.load and ujson.dump methods for JSON parsing.

Current Behavior

JSONStorage ignore custom JSON libraries and use the default json library, because the json library import is done by simply using:

import json

Possible solutions

I have found two possible solutions:

• Change the import statement with something like:

  try:
      import ujson as json
  except ImportError:
      import json

• Currently is not possible to change import json to from ...utils import json to automatically use the custom installed library (as done here or in lots of other files in the library), because aiogram/utils/json.py implements only dumps and loads methods. In order to use from ...utils import json, you would have to implement also dump and load methods.