chore(deps): update dependency cloudevents to v8 (#565)

Co-authored-by: HKWinterhalter <[email protected]>

Author: renovate-bot

package-lock.json

@@ -21,7 +21,7 @@
   "dependencies": {
     "@types/express": "4.17.21",
     "body-parser": "^1.18.3",
-    "cloudevents": "^7.0.0",
+    "cloudevents": "^8.0.0",
     "express": "^4.16.4",
     "minimist": "^1.2.7",
     "on-finished": "^2.3.0",