chore(deps): update dependency rimraf to v6

Author: renovate[bot]

package.json

@@ -69,7 +69,7 @@
     "karma-tap": "^4.2.0",
     "nyc": "^15.1.0",
     "phantomjs-prebuilt": "^2.1.3",
-    "rimraf": "^2.2.8",
+    "rimraf": "^6.0.0",
     "server-destroy": "^1.0.1",
     "standard": "^9.0.0",
     "tap": "^15.1.5",