chore: bump @npmcli/config from 4.2.2 to 6.0.0 (#167)

* chore: bump @npmcli/config from 4.2.2 to 6.0.0

Bumps [@npmcli/config](https://github.com/npm/config) from 4.2.2 to 6.0.0.
- [Release notes](https://github.com/npm/config/releases)
- [Changelog](https://github.com/npm/config/blob/main/CHANGELOG.md)
- [Commits](npm/config@v4.2.2...v6.0.0)

---
updated-dependencies:
- dependency-name: "@npmcli/config"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

* chore: call config.validate() after loading in tests

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Luke Karrys <luke@lukekarrys.com>

package.json

@@ -28,7 +28,7 @@
     "validate-npm-package-name": "^5.0.0"
   },
   "devDependencies": {
-    "@npmcli/config": "^4.0.1",
+    "@npmcli/config": "^6.0.0",
     "@npmcli/eslint-config": "^4.0.0",
     "@npmcli/template-oss": "4.5.1",
     "tap": "^16.0.1"

test/npm-defaults.js

@@ -139,6 +139,7 @@ t.test('npm configuration values pulled from environment', async t => {
   })
 
   await conf.load()
+  conf.validate()
 
   process.chdir(testdir)
 
@@ -178,6 +179,7 @@ init.version=${EXPECTED.version}`,
   })
 
   await conf.load()
+  conf.validate()
 
   process.chdir(testdir)
 
@@ -217,6 +219,7 @@ init-version=${EXPECTED.version}`,
   })
 
   await conf.load()
+  conf.validate()
 
   process.chdir(testdir)