Describe the bug

Error with the prettier dependency while running the lint script from @wordpress/scripts after a new npm install.

To reproduce
Steps to reproduce the behavior:

1. Create a project and add the @wordpress/scripts dev dependency

> mkdir scripts-test \
&& cd scripts-test \
&& npm init -y && npm i -D @wordpress/scripts

2. Add the script to the package.json: "lint:js": "wp-scripts lint-js"
3. Create a js file and run the lint to see it is working.

> echo 'const x = 1;' >index.js \
&& npm run lint:js

4. Checking the prettier dependency in this moment:

> npm ls prettier
scripts-test@1.0.0 /Users/renatho/Downloads/scripts-test
└─┬ @wordpress/scripts@7.1.3
  ├─┬ @wordpress/eslint-plugin@4.0.0
  │ └── prettier@npm:wp-prettier@1.19.1  deduped
  └── prettier@npm:wp-prettier@1.19.1

5. You can make a git init here and commit the package-lock to see the next changes.
6. Remove the node_modules folder, reinstall the packages and run the lint script. The new install will update (unexpectedly) our package-lock.json and It stops to work because it doesn't find the prettier. You will see the error Error: Cannot find module 'prettier'

> rm -rf node_modules \
&& npm i \
&& npm run lint:js

7. Check the prettier dependency to understand what happened (you can also see the package-lock diff):

> npm ls prettier
scripts-test@1.0.0 /Users/renatho/Downloads/scripts-test
└─┬ @wordpress/scripts@7.1.3
  ├─┬ @wordpress/eslint-plugin@4.0.0
  │ └── UNMET PEER DEPENDENCY prettier@npm:wp-prettier@1.19.1 
  └── prettier@npm:wp-prettier@1.19.1

Expected behavior

Install the @wordpress/scripts and after other npm install it continues to work properly while running the npm run lint:js.

Version (please complete the following information):

• A clean project with only the @wordpress/scripts installed. Reproduced in 7.1.3 and 8.0.1

Desktop (please complete the following information):

• OS: macOS Catalina
• NPM 6.14.4 / Node 10.17.0