Bump Microsoft.Build.Traversal from 3.4.0 to 4.0.0 (#1280)

Bumps [Microsoft.Build.Traversal](https://github.com/Microsoft/MSBuildSdks) from 3.4.0 to 4.0.0.
- [Release notes](https://github.com/Microsoft/MSBuildSdks/releases)
- [Changelog](https://github.com/microsoft/MSBuildSdks/blob/main/RELEASE.md)
- [Commits](microsoft/MSBuildSdks@Microsoft.Build.Traversal.3.4.0...Microsoft.Build.Traversal.4.0.0)

---
updated-dependencies:
- dependency-name: Microsoft.Build.Traversal
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

global.json

@@ -5,6 +5,6 @@
     "rollForward": "latestMajor"
   },
   "msbuild-sdks": {
-    "Microsoft.Build.Traversal" : "3.4.0"
+    "Microsoft.Build.Traversal" : "4.0.0"
   }
 }