## Current Behavior
The [docs](https://nx.dev/nx-api/next/generators/library#unittestrunner)
say that you can use vitest as a unitTestRunner option. It also worked
when I tested with the following command:
```sh
nx g @nx/next:library shared --dir=modules/shared --style none --dry-run --projectNameAndRootFormat as-provided --component false --unitTestRunner vitest
```
But types say otherwise:
## Expected Behavior
Types will allow 'vitest' option for a unitTestRunner
## Related Issue(s)
none
Co-authored-by: Emily Xiong <xiongemi@gmail.com>
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