chore(deps): update dependency c8 to v6 (#408)

Author: renovate-bot

package.json

@@ -63,7 +63,7 @@
     "@types/uuid": "^3.4.4",
     "body-parser": "^1.19.0",
     "boom": "^7.3.0",
-    "c8": "^5.0.1",
+    "c8": "^6.0.0",
     "codecov": "^3.5.0",
     "cpy-cli": "^2.0.0",
     "delay": "^4.3.0",