Enable private vulnerability reporting

[Panya]

Hi there.

I've found a security issue in your library. Can you enable the newly deployed feature of GitHub (https://docs.github.com/en/code-security/security-advisories/repository-security-advisories/configuring-private-vulnerability-reporting-for-a-repository), so I can share the details?

I also reported it to https://huntr.dev. The issue should be accessible to you by this URL: https://huntr.dev/bounties/8879054f-80a7-457c-bf17-a4ecd4b73a28/

[hollabaq86]

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