create or derive package-lock.json file from npm-shrinkwrap.json

Question

Previously we had old version of npm and I used npm-shrinkwrap.json file to lock down the dependencies. Now we upgarded to npm 6 and I want to use package-lock.json instead of old npm-shrinkwrap.json .

So how can I create a package-lock.json now?

• Is there any tool available for converting npm-shrinkwrap.json to package-lock.json?
• I've found the a thread which is suggesting to rename npm-shrinkwrap.json to package-lock.json.
• Is it okay to do that? because I'm not sure about the underlying logic for npm shrinkwrap and new npm install