chore(deps): update dependency feed to ^4.2.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
feed	dependencies	minor	^4.1.0 -> ^4.2.0

---

Release Notes

jpmonette/feed

### [`v4.2.0`](https://togithub.com/jpmonette/feed/blob/master/CHANGELOG.md#​420-httpsgithubcomjpmonettefeedtree420-2020-05-25) [Compare Source](https://togithub.com/jpmonette/feed/compare/4.1.0...4.2.0) [Full Changelog](https://togithub.com/jpmonette/feed/compare/4.1.0...4.2.0) **Closed issues:** - Getting an error during Netlify deploy (and npm run build) [#​118](https://togithub.com/jpmonette/feed/issues/118) - atom:link in RSS feed should point to self, not atom [#​113](https://togithub.com/jpmonette/feed/issues/113) **Merged pull requests:** - Update dependencies + Formatting + Add Comments [#​123](https://togithub.com/jpmonette/feed/pull/123) ([jpmonette](https://togithub.com/jpmonette)) - fix: 🐛 atom link needs to point to self [#​122](https://togithub.com/jpmonette/feed/pull/122) ([decebal](https://togithub.com/decebal)) - feat: 🎸 add mandatory rss2 attributes on enclosure [#​120](https://togithub.com/jpmonette/feed/pull/120) ([decebal](https://togithub.com/decebal)) - Bump acorn from 5.7.3 to 5.7.4 [#​116](https://togithub.com/jpmonette/feed/pull/116) ([dependabot\[bot\]](https://togithub.com/apps/dependabot))

---

Renovate configuration

:date: Schedule: At any time (no schedule defined).

:vertical_traffic_light: Automerge: Disabled by config. Please merge this manually once you are satisfied.

:recycle: Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

:no_bell: Ignore: Close this PR and you won't be reminded about this update again.

---

• [ ] If you want to rebase/retry this PR, check this box

---

This PR has been generated by WhiteSource Renovate. View repository job log here.