Bump @types/node from 15.9.0 to 15.12.0 in /example/typescript

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] <support@github.com>

example/typescript/package-lock.json

@@ -4,9 +4,9 @@
   "lockfileVersion": 1,
   "dependencies": {
     "@types/node": {
-      "version": "15.9.0",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-15.9.0.tgz",
-      "integrity": "sha512-AR1Vq1Ei1GaA5FjKL5PBqblTZsL5M+monvGSZwe6sSIdGiuu7Xr/pNwWJY+0ZQuN8AapD/XMB5IzBAyYRFbocA==",
+      "version": "15.12.0",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-15.12.0.tgz",
+      "integrity": "sha512-+aHJvoCsVhO2ZCuT4o5JtcPrCPyDE3+1nvbDprYes+pPkEsbjH7AGUCNtjMOXS0fqH14t+B7yLzaqSz92FPWyw==",
       "dev": true
     },
     "date-format": {

example/typescript/package.json

@@ -10,7 +10,7 @@
     "typescript": "4.2.4"
   },
   "devDependencies": {
-    "@types/node": "^15.9.0",
+    "@types/node": "^15.12.0",
     "log4js": "^6.3.0"
   }
 }