Transitive dependencies are installed when creating patch for single package

Running `npx patch-package mypackage` (in this case using npm as the package manager) also installs transitive dependencies of `mypackage`, which can take a long time and should not be necessary if you only want to create a patch for `mypackage`.

To avoid downloading transitive dependencies, [`npm pack mypackage`](https://docs.npmjs.com/cli/v7/commands/npm-pack) can be used, for example, as it actually downloads the tarball for the specified package.

Or is there some other reason for this behavior?