`remake update-framework` should also update package.json

[panphora]

Describe the bug
When the main framework is updated, it often includes installing/updating npm packages. These change the package.json file. But only the _remake directory is updated — not the package.json file.

Expected behavior
Remake's dependencies should be stored in a way that they don't interfere with user-installed dependencies. And you should be able to update Remake without interfering with the user's dependencies.