Fixed attribute not found issues for hf_bert_tokenizer (#311)
Fixed attribute not found issues for hf_bert_tokenizer (#311)

* Fixed do_lower_case attribute not found issue

* Added check for strip_accents

* Fixed typo

* Changed strip_accents handling

Co-authored-by: sayanshaw <f4f4e95a342b49b9cc4c73a2debebd29d4fcc708@microsoft.com>
microsoft/onnxruntime-extensions,microsoft/onnxruntime-extensions,microsoft/onnxruntime-extensions,microsoft/onnxruntime-extensions,microsoft/onnxruntime-extensions