Tronpy

Python 3.12 support, drop python 3.7 support

Use cryptographically secure generator for PrivateKeys
Upgrade dependencies
A few new methods related to stake V2 API

**Breaking**: Support stake V2 APIs (note: old APIs won't work anymore)
Add optional ability to derive addresses from seed
Use correct version in User-Agent
Trongrid JWT support
Separate `trigger_constant_contract` from `trigger_const_smart_contract_function` method

Update dependencies, remove upper version pins
Switch to native cryptography for secp256k1 curves via coincurve library, no longer use pure-python ecdsa library
Use poetry-core in pyproject.toml for lighter builds
Fix padding bytes issues
Make latest block id parsing more reliable
New `get_function_by_selector` function
Fixes for lowercase constructor type
Add `expiration` method to TransactionBuilder
Add `code_hash` to Contract constructor
Added `set_signature` method to Transaction
Add new `withdraw_rewards` method
Add event logs parser
And many more...

Internal changes:
Setup CI testing and reformat code with black, isort and flake8