Upstream Prototype Pollution vulnerability from selfsigned 1.10.11 -> node-forge 0.10.0

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### Bug report



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There is an open CVE for `node-forge` 0.10.0, which webpack-dev-server includes via `selfsigned` 1.10.11. 

- https://github.com/advisories/GHSA-5rrq-pxf6-6jx5

- https://github.com/advisories/GHSA-gf8q-jrpm-jvxq



Updating to `selfsigned` 1.10.13 will address the issue and is a backwards compatible update. This was attempted to be fixed in https://github.com/webpack/webpack-dev-server/pull/4162 by @wcedmisten-reify, but they could not sign the CLA. Setting up issue for another contributor who can make the change.



### Actual Behavior



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Message from dependabot about the security issue:

```

The latest possible version that can be installed is 0.10.0 because of the following conflicting dependency:

webpack-dev-server@4.7.2 requires node-forge@^0.10.0 via selfsigned@1.10.11

The earliest fixed version is 1.0.0.

```



### Expected Behavior



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N/A



### How Do We Reproduce?



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N/A



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