fix(deps): update dependency v8-to-istanbul to v4 (#167)

Author: renovate[bot]

package-lock.json

@@ -40,7 +40,7 @@
     "istanbul-reports": "^2.2.6",
     "rimraf": "^3.0.0",
     "test-exclude": "^5.2.3",
-    "v8-to-istanbul": "^3.2.6",
+    "v8-to-istanbul": "^4.0.0",
     "yargs": "^15.0.0",
     "yargs-parser": "^16.0.0"
   },