Allow onnx export for maxpool with dilations (#18721)
Summary:
Now, MaxPool operator supports the 'dilations' attribute with this commit:
https://github.com/onnx/onnx/commit/b22041c3f16cf8bcca9ed93982d6ffdf6ebf3746
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18721
Reviewed By: zrphercule
Differential Revision: D15152400
Pulled By: houseroad
fbshipit-source-id: e8f5ab35c5c2c3a540a22f7cf7bb453d892d0400
