parser: add support for f-strings #236

File "/opt/homebrew/Cellar/python@3.9/3.9.20/Frameworks/Python.framework/Versions/3.9/lib/python3.9/json/init.py", line 339, offset 80
raise TypeError(f'the JSON object must be str, bytes or bytearray, '

SyntaxError: 'invalid syntax'