chore(deps): update dependency sinon to v9

Author: renovate-bot

app/templates/package.json

@@ -31,6 +31,6 @@
     "mocha": "6.2.3",
     "nyc": "14.1.1",
     "proxyquire": "2.1.3",
-    "sinon": "7.5.0"
+    "sinon": "9.0.2"
   }
 }