Add linting

[robindykema]

I work for Indeed, and I recently filed a bug for a missing null check in embedded entries that was fixed (thanks!) that crashed our entire page.

That's a pretty obvious and easy issue, so I was surprised a linter didn't find that for you. I checked and you're using tslint, which has been deprecated since 2019.

I think you'd be able to anticipate and fix a lot of these bugs if you added up to date linting.

[cs-raj]

Hey @robindykema
We will update it and get back
cc: @netrajpatel @nadeem-cs @harshithad0703

[nadeem-cs]

@robindykema We've resolved the linting issue in the above mentioned PR.
Closing this issue.