* iter per learner * code cleanup
* flaml v0.3 * low cost partial config
* bug fix * admissible region * use CFO's init point as backup * step lower bound * test electra
* xgboost notebook * finetuning notebook * finetuning test * experimental nni support * support nested search space * log file name * record training_iteration * eps * reset times * std set to default step size if 0
* test distillbert * import check * complete partial config * None check * init config is not suggested by bo * badge * notebook for lightgbm