Make peerDependencies package.json snippet valid JSON

[sadams]

What is the purpose of this pull request? (put an "X" next to item)

[x] Documentation update
[ ] Bug fix (template)
[ ] New rule (template)
[ ] Changes an existing rule (template)
[ ] Add autofixing to a rule
[ ] Add a CLI option
[ ] Add something to the core
[ ] Other, please explain:

Make peerDependencies package.json snippet valid.

[eslintbot]

Thanks for the pull request, @sadams! I took a look to make sure it's ready for merging and found some changes are needed:

• The commit summary needs to begin with a tag (such as Fix: or Update:). Please check out our guide for how to properly format your commit summary and update it on this pull request.

Can you please update the pull request to address these?

(More information can be found in our pull request guide.)

[jsf-clabot]

All committers have signed the CLA.

[eslintbot]

LGTM

[gyandeeps]

Thanks for your contribution. 💯

[not-an-aardvark]

Thanks for contributing!