Bump @types/node from 13.13.52 to 15.12.2

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 13.13.52 to 15.12.2.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -31,7 +31,7 @@
     "mocha": "^7.0.0"
   },
   "dependencies": {
-    "@types/node": "^13.1.8",
+    "@types/node": "^15.12.2",
     "typescript": "^3.4.5"
   }
 }