build!: Bump Node.js to 20 (#10616)

BREAKING CHANGE: Node.js 20 or above is required.

packages/docgen/package.json

@@ -68,7 +68,7 @@
 	"devDependencies": {
 		"@favware/cliff-jumper": "^4.1.0",
 		"@types/jsdoc-to-markdown": "^7.0.6",
-		"@types/node": "^18.19.64",
+		"@types/node": "^20.17.8",
 		"cross-env": "^7.0.3",
 		"eslint": "^8.57.1",
 		"eslint-config-neon": "^0.1.62",
@@ -79,7 +79,7 @@
 		"typescript": "~5.5.4"
 	},
 	"engines": {
-		"node": ">=18"
+		"node": ">=20"
 	},
 	"publishConfig": {
 		"access": "public",