fix(deps): update dependency nyc to v15.1.0

Author: renovate-bot

package-lock.json

@@ -53,7 +53,7 @@
     "globby": "11.0.0",
     "istanbul-lib-coverage": "3.0.0",
     "js-yaml": "3.14.0",
-    "nyc": "15.0.1"
+    "nyc": "15.1.0"
   },
   "devDependencies": {
     "@babel/core": "7.10.2",