Paddle2ONNX v0.8

New Feature

• Automatic correction of opset version
• Support the fallback selection of custom op

New Operator Support

• softplus related pull request #252
• elementwise_mod
• elementwise_floordiv
• p_norm
• depthwise_conv2d_transpose
• group_norm
• top_k related pull request #293

Bug Fix

• clip operator, related pull request #280
• fill_constant_batch_size_like operator, related pull request #318
• multiclass_nms operator, fix issue of #315, related pull request #318
• top_k_v2 operator, related pull request #252
• expand_v2 operator, related pull request #252
• assign_value operator, related pull request #252
• slice operator, related pull request #268
• sum operator, related pull request #293