Upgrading lightGBM API usage

🐛 Bug Description

The current usage of lightGBM API is deprecated.

  /home/xiaoyang/miniconda3/envs/kaggle/lib/python3.7/site-packages/lightgbm/engine.py:177: UserWarning: Found `n_estimators` in params. Will use it instead of argument
    _log_warning(f"Found `{alias}` in params. Will use it instead of argument")
  /home/xiaoyang/miniconda3/envs/kaggle/lib/python3.7/site-packages/lightgbm/engine.py:181: UserWarning: 'early_stopping_rounds' argument is deprecated and will be removed in a future release of LightGBM. Pass 'early_stopping()'
  callback via 'callbacks' argument instead.                                                                                                                                                                                             _log_warning("'early_stopping_rounds' argument is deprecated and will be removed in a future release of LightGBM. "
  /home/xiaoyang/miniconda3/envs/kaggle/lib/python3.7/site-packages/lightgbm/engine.py:239: UserWarning: 'verbose_eval' argument is deprecated and will be removed in a future release of LightGBM. Pass 'log_evaluation()' callback
  via 'callbacks' argument instead.
    _log_warning("'verbose_eval' argument is deprecated and will be removed in a future release of LightGBM. "
  /home/xiaoyang/miniconda3/envs/kaggle/lib/python3.7/site-packages/lightgbm/engine.py:260: UserWarning: 'evals_result' argument is deprecated and will be removed in a future release of LightGBM. Pass 'record_evaluation()' callba
  ck via 'callbacks' argument instead.
    _log_warning("'evals_result' argument is deprecated and will be removed in a future release of LightGBM. "

To Reproduce

Steps to reproduce the behavior:

1. train Qlib models based on lightGBM

Expected Behavior

Screenshot

Environment

Note: User could run cd scripts && python collect_info.py all under project directory to get system information and paste them here directly.

• Qlib version:
• Python version:
• OS (Windows, Linux, MacOS):
• Commit number (optional, please provide it if you are using the dev version):

Additional Notes