Bump @types/node in /samples/lib/spa-angular-client

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 15.12.5 to 16.4.9.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

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

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

Author: dependabot[bot]

samples/lib/spa-angular-client/package-lock.json

@@ -44,7 +44,7 @@
     "@types/base64-arraybuffer": "^0.2.0",
     "@types/jasmine": "~3.8.2",
     "@types/jasminewd2": "~2.0.10",
-    "@types/node": "^15.12.5",
+    "@types/node": "^16.4.9",
     "@types/uuid": "^8.3.1",
     "@types/webappsec-credential-management": "^0.6.1",
     "codelyzer": "^6.0.2",