Update dependency octokit to v4 (#2035)

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This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [octokit](https://togithub.com/octokit/octokit.js) | [`3.2.1` -> `4.0.2`](https://renovatebot.com/diffs/npm/octokit/3.2.0/4.0.2) | [![age](https://developer.mend.io/api/mc/badges/age/npm/octokit/4.0.2?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![adoption](https://developer.mend.io/api/mc/badges/adoption/npm/octokit/4.0.2?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![passing](https://developer.mend.io/api/mc/badges/compatibility/npm/octokit/3.2.0/4.0.2?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/octokit/3.2.0/4.0.2?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

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### Release Notes

<details>
<summary>octokit/octokit.js (octokit)</summary>

### [`v4.0.2`](https://togithub.com/octokit/octokit.js/releases/tag/v4.0.2)

[Compare Source](https://togithub.com/octokit/octokit.js/compare/v4.0.1...v4.0.2)

##### Bug Fixes

-   **build:** actually output ESM ([#&#8203;2678](https://togithub.com/octokit/octokit.js/issues/2678)) ([9604674](https://togithub.com/octokit/octokit.js/commit/9604674bc1436e81c189fc04dc284f5e284e07cd))

### [`v4.0.1`](https://togithub.com/octokit/octokit.js/releases/tag/v4.0.1)

[Compare Source](https://togithub.com/octokit/octokit.js/compare/v4.0.0...v4.0.1)

##### Bug Fixes

-   **docs:** remove NodeJS 10  and add callout for conditional exports ([#&#8203;2675](https://togithub.com/octokit/octokit.js/issues/2675)) ([c99ff62](https://togithub.com/octokit/octokit.js/commit/c99ff62ea2661453bfa94ccd6338061a83b7f280))

### [`v4.0.0`](https://togithub.com/octokit/octokit.js/releases/tag/v4.0.0)

[Compare Source](https://togithub.com/octokit/octokit.js/compare/v3.2.1...v4.0.0)

##### BREAKING CHANGES

-   package is now ESM
-   remove authentication type "oauth" that was previously deprecated
-   Switch from `@octokit/webhooks-types` to `@octokit/openapi-webhooks-types` due to the transition to using GitHub's OpenAPI schema

### [`v3.2.1`](https://togithub.com/octokit/octokit.js/releases/tag/v3.2.1)

[Compare Source](https://togithub.com/octokit/octokit.js/compare/v3.2.0...v3.2.1)

##### Bug Fixes

-   update rest endpoints ([#&#8203;2667](https://togithub.com/octokit/octokit.js/issues/2667)) ([98785f4](https://togithub.com/octokit/octokit.js/commit/98785f430c4c3ce3a6d5456ca2072030143e3635))

</details>

---

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package.json

@@ -171,7 +171,7 @@
     "node-fetch": "3.3.2",
     "npm-run-all2": "6.2.0",
     "nprogress": "0.2.0",
-    "octokit": "3.2.1",
+    "octokit": "4.0.2",
     "open": "10.1.0",
     "outdent": "0.8.0",
     "pixrem": "5.0.0",