[Fix] replace np.int with int

[jin-s13]

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Motivation

numpy 1.24.0 removes np.bool, np.float, np.int. To fix it, I replace np.int (and some np.int64) with np.int32.

Modification

BC-breaking (Optional)

Use cases (Optional)

Checklist

Before PR:

• [ ] I have read and followed the workflow indicated in the CONTRIBUTING.md to create this PR.
• [ ] Pre-commit or linting tools indicated in CONTRIBUTING.md are used to fix the potential lint issues.
• [ ] Bug fixes are covered by unit tests, the case that causes the bug should be added in the unit tests.
• [ ] New functionalities are covered by complete unit tests. If not, please add more unit tests to ensure correctness.
• [ ] The documentation has been modified accordingly, including docstring or example tutorials.

After PR:

• [ ] CLA has been signed and all committers have signed the CLA in this PR.

[jin-s13]

Same problems exist in xtcocotools, I will fix xtcocotools. We may need to upgrade xtcocotools afterwards.

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edit:

We need to upgrade xtcocotools==1.13

[dancingdarwin]

Hello, I'd like to kindly follow up on this pull request. I tried downgrading numpy to 1.20.0 but then I get other errors from xtocotools. Thanks so much!