Onnx operator coverage

Hi,

Based on the mxnet onnx operator coverage wiki LSTM, Bi-LSTM, CRF are not covered yet. I need operator coverage for

    1. Long short-term memory (LSTM)
    2. Bidirectional-LSTM (Bi-LSTM)
    3. Conditional random field (CRF)
    4. Affine transformation
    5. Activation functions (e.g., sigmoid)
    6. Softmax function
    7. Batch normalization (BN)

I would like to request coverage or I am even available to contribute to the codebase and implement the coverage with some guidance.

Thanks!
Prashan