package.json doesn't list peer dependencies

[jefflee-figma]

The installation instructions in the README ask users to include typescript, eslint, and typescript-eslint in their project. The technical term for this is peer dependencies.

It should be possible to specify peer dependencies in this project's package.json, so that if a project includes eslint-plugin-figma-plugins but forgets to also add the peer dependencies, npm will show a useful error message.

The primary issue is deciding how permissive or restrictive we want to be with the dependencies. I don't have a principled idea of how far into the past or future we should set the version constraints.

The simplest thing would be to set the peer dependencies to equal this package's dependencies, i.e., accepting all minor versions equal to or newer than the versions of the peer deps directly used by this package's package.json. The upside is that we don't need to do any extra work to verify that the peer dependency versions will work with the plugin. The downside is that it may be more restrictive than it needs to be; the plugin may be compatible in practice with older versions of the peer dependencies.