Use orjson instead native json to improve performance

[gaetan1903]

orjson is a fast, correct JSON library for Python.

it's written in rust with maturin, so it is fast

A simple image to show difference of performance

WRITE DATA

QUERY DATA

[msiemens]

Thanks for your contribution, @gaetan1903! Unfortunately, I'll close this pull request. It's not that your suggestion or code is bad but rather that it's part of TinyDB's design (and its selling points) that it does not have any external dependencies. However, if you turn this into a new storage backend and release it on PyPI, I'll gladly link to it in the documentation and mention the performance benefits. That way users can decide if they prefer using Python's native json module or if they'd rather install (and potentially compile) a binary dependency in order to gain a performance increase. I hope you understand the reasoning behind this! If not, feel free to ask 🙂