Bump @types/node from 10.9.4 to 15.6.2

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 10.9.4 to 15.6.2.
- [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>

Author: dependabot-preview[bot]

package-lock.json

@@ -36,7 +36,7 @@
     "hash.js": "^1.1.3"
   },
   "devDependencies": {
-    "@types/node": "^10.9.4",
+    "@types/node": "^15.6.2",
     "typescript": "^3.0.3"
   }
 }