Upgrade to the latest version of ESLint

Created by: gitstart-sourcegraph

Test plan

1. Clone this repo
2. Switch to the branch contractors/SG-33303-2 on the above repo (client-sourcegraph-eslint-config)
3. Install the above local client-sourcegraph-eslint-config in the client-sourcegraph by running yarn add file:path to client-sourcegraph-eslint-config or if you get error then change "@sourcegraph/eslint-config": "^0.27.0" in package.json to "@sourcegraph/eslint-config": "file:path to client-sourcegraph-eslint-config" and then run yarn
4. Then run yarn lint:js:all in the client-sourcegraph repo.

Description

Our eslint version is outdated, and we need to upgrade to the latest one to use new features.

Success Criteria

eslint is upgraded to the latest version.

Implementation Details

• Upgrade to the latest version of eslint in the main repo.

Refs

Sourcegraph Issue Gitstart Ticket

App preview:

• Web
• Storybook

Check out the client app preview documentation to learn more.