Bump pkg-up from 3.1.0 to 4.0.0

Bumps [pkg-up](https://github.com/sindresorhus/pkg-up) from 3.1.0 to 4.0.0.
- [Release notes](https://github.com/sindresorhus/pkg-up/releases)
- [Commits](sindresorhus/package-up@v3.1.0...v4.0.0)

---
updated-dependencies:
- dependency-name: pkg-up
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -75,7 +75,7 @@
     "markdown-it-include": "^2.0.0",
     "markdown-it-table-of-contents": "^0.6.0",
     "multi-integer-range": "^4.0.9",
-    "pkg-up": "^3.1.0",
+    "pkg-up": "^4.0.0",
     "puppeteer-core": "^13.3.2",
     "serve-handler": "^6.1.3",
     "string-template": "^1.0.0",