• I have read the contribution documentation for this project.
• I agree to follow the code of conduct that this project follows, as appropriate.
• The changes are appropriately documented (if applicable).
• The changes have sufficient test coverage (if applicable).
• The testsuite passes successfully on my local machine (if applicable).

Summarize your changes:

This follows up electron/asar#380, which implements a management API for electron/electron#48587.

Some additional things we might want to do:

1. Add the plugin to https://github.com/electron/forge/blob/next/packages/api/core/src/api/init-scripts/init-npm.ts
2. Add the plugin to the default templates.
3. Anything else beyond the plugin simply existing.