[Transform] Modules for Augmentation

[mufeili]

Description

Checklist

Please feel free to remove inapplicable items for your PR.

• The PR title starts with [$CATEGORY] (such as [NN], [Model], [Doc], [Feature]])
• Changes are complete (i.e. I finished coding on this PR)
• All changes have test coverage
• Code is well-documented
• To the best of my knowledge, examples are either not affected by this change,
  or have been fixed to be compatible with this change
• Related issue is referred in this PR
• If the PR is for a new model/paper, I've updated the example index here.

[dgl-bot]

To trigger regression tests:

• @dgl-bot run [instance-type] [which tests] [compare-with-branch];
  For example: @dgl-bot run g4dn.4xlarge all dmlc/master or @dgl-bot run c5.9xlarge kernel,api dmlc/master

[mufeili]

@VoVAllen It seems that PyTorch CI still raises an error about PyTorch version like below:

Exception: Detected an old version of PyTorch. Please update torch>=1.8.0 for the best experience.

[VoVAllen]

@mufeili It's on windows. Please contact @BarclayII to update the pytorch version on windows CI machine

[jermainewang]

Does it mean that once this is merged, we need to update the minimal required version of PyTorch?

[mufeili]

Does it mean that once this is merged, we need to update the minimal required version of PyTorch?

Yes, 1.8.0