Bump webpagetest from 0.5.0 to 0.6.0

Bumps [webpagetest](https://github.com/WebPageTest/webpagetest-api) from 0.5.0 to 0.6.0.
- [Release notes](https://github.com/WebPageTest/webpagetest-api/releases)
- [Commits](catchpoint/WebPageTest.api-nodejs@v0.5.0...v0.6.0)

---
updated-dependencies:
- dependency-name: webpagetest
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -28,7 +28,7 @@
     "spore": "0.1.6",
     "stdio": "2.1.1",
     "sync-request": "6.1.0",
-    "webpagetest": "^0.5.0",
+    "webpagetest": "^0.6.0",
     "xml2js": "0.4.23"
   },
   "devDependencies": {