Bump @types/node from 14.17.3 to 15.12.2

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 14.17.3 to 15.12.2.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

---
updated-dependencies:
- dependency-name: "@types/node"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -29,7 +29,7 @@
   },
   "devDependencies": {
     "@types/jest": "^26.0.23",
-    "@types/node": "^14.17.3",
+    "@types/node": "^15.12.2",
     "@typescript-eslint/eslint-plugin": "^4.26.1",
     "@typescript-eslint/parser": "^4.26.1",
     "@vercel/ncc": "^0.28.6",