Update Node.js to v20.19.0 (#522)

| datasource   | package | from     | to       |
| ------------ | ------- | -------- | -------- |
| node-version | node    | v20.18.3 | v20.19.0 |
| node-version | node    | v20.0.0  | v20.19.0 |

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.nvmrc

@@ -1 +1 @@
-20.18.3
+20.19.0

package.json

@@ -36,7 +36,7 @@
     "typescript": "^5.8.3"
   },
   "engines": {
-    "node": ">=20"
+    "node": ">=20.19.0"
   },
   "exports": {
     ".": "./dist/index.js"