Bump @perspective-dev/workspace from 4.0.1 to 4.2.0 in /js

Bumps [@perspective-dev/workspace](https://github.com/perspective-dev/perspective) from 4.0.1 to 4.2.0.
- [Release notes](https://github.com/perspective-dev/perspective/releases)
- [Changelog](https://github.com/perspective-dev/perspective/blob/master/CHANGELOG.md)
- [Commits](perspective-dev/perspective@v4.0.1...v4.2.0)

---
updated-dependencies:
- dependency-name: "@perspective-dev/workspace"
  dependency-version: 4.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

js/package.json

@@ -45,7 +45,7 @@
     "@perspective-dev/viewer": "^4.0.0",
     "@perspective-dev/viewer-d3fc": "^4.0.1",
     "@perspective-dev/viewer-datagrid": "^4.0.1",
-    "@perspective-dev/workspace": "^4.0.1"
+    "@perspective-dev/workspace": "^4.2.0"
   },
   "devDependencies": {
     "@finos/perspective-esbuild-plugin": "^3.2.1",