Bump @types/node from 15.9.0 to 15.12.0

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 15.9.0 to 15.12.0.
- [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-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -123,7 +123,7 @@
   "devDependencies": {
     "@types/glob": "^7.1.3",
     "@types/mocha": "^8.2.2",
-    "@types/node": "^15.9.0",
+    "@types/node": "^15.12.0",
     "@types/vscode": "^1.56.0",
     "@typescript-eslint/eslint-plugin": "^4.26.0",
     "@typescript-eslint/parser": "^4.26.0",