build(deps): bump dot-prop in /test/client-libraries-integration

Bumps [dot-prop](https://github.com/sindresorhus/dot-prop) from 4.2.0 to 5.2.0.
- [Release notes](https://github.com/sindresorhus/dot-prop/releases)
- [Commits](https://github.com/sindresorhus/dot-prop/compare/v4.2.0...v5.2.0)

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

test/client-libraries-integration/package.json

@@ -3,7 +3,7 @@
   "version": "0.0.1",
   "description": "",
   "dependencies": {
-    "dot-prop": "^4.2.0",
+    "dot-prop": "^5.2.0",
     "google-proto-files": "^0.15.1",
     "mocha": "^5.0.4",
     "shimmer": "^1.2.0"