chore(deps): nyc

Author: renovate-bot

package.json

@@ -64,7 +64,7 @@
     "eslint-plugin-ember": "8.5.2",
     "husky": "1.3.1",
     "loader.js": "4.7.0",
-    "nyc": "14.1.1",
+    "nyc": "15.1.0",
     "qunit-dom": "1.2.0",
     "remark-cli": "6.0.1",
     "remark-lint": "6.0.6",