build(deps): bump pkg-conf from 3.1.0 to 4.0.0

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

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

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

package.json

@@ -54,7 +54,7 @@
   "dependencies": {
     "get-stdin": "^8.0.0",
     "minimist": "^1.2.6",
-    "pkg-conf": "^3.1.0",
+    "pkg-conf": "^4.0.0",
     "xdg-basedir": "^4.0.0"
   },
   "devDependencies": {