Refactor config (#185)

update: Support for Bert-VITS2 in SSML

update: Compatible with the transitional version of Bert-VITS2 v1.1.

update: version in lang_dict.py

update: Bert_VITS2 v1.1.1

update: Modify the legacy parameter. Better prompt for older versions.

Code refactor. Add automatic language classification to bert_vits2