Automating npm dependencies using a service such as Greenkeeper is great! I would not be able maintain as many projects without that kind of automation.
However, linters such as Prettier or Standard are different. Every fix or new feature version introduces new formatting rules and might break your tests.
I wrote a blog post on how to automate the updates of Prettier by creating pull requests which include the updated code, check it out: https://dev.to/gr2m/automate-updates-of-prettier-standard-and-other-javascript-linting-tools-using-github-actions-nko