build(deps-dev): bump @types/node from 15.3.0 to 15.6.0 (#715)

Bumps [@types/node](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/node) from 15.3.0 to 15.6.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/node)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -61,7 +61,7 @@
     "@types/debug": "4.1.5",
     "@types/jest": "26.0.23",
     "@types/jest-dev-server": "4.2.0",
-    "@types/node": "15.3.0",
+    "@types/node": "15.6.0",
     "@types/rimraf": "^3.0.0",
     "@types/uuid": "^8.3.0",
     "@typescript-eslint/eslint-plugin": "4.23.0",