Update node to v22 (#280)

What it says on the tin.

Author: dtemkin1

README.md

@@ -5,7 +5,7 @@
 Install:
 
 - Python 3, at least Python 3.8.
-- Node.js, at least Node.js 20.
+- Node.js, at least Node.js 22.
   - One way to manage Node versions is using [nvm](https://github.com/nvm-sh/nvm).
 
 In the root directory, run:

package-lock.json

@@ -48,7 +48,7 @@
     "ci-all": "npm run typecheck && npm test && npm run ci-eslint && npm run ci-prettier"
   },
   "engines": {
-    "node": ">=20"
+    "node": ">=22"
   },
   "devDependencies": {
     "@chakra-ui/cli": "^3.31.0",
@@ -57,7 +57,7 @@
     "@react-router/dev": "^7.13.0",
     "@react-router/fs-routes": "^7.13.0",
     "@types/jsdom": "^27.0.0",
-    "@types/node": "^20.19.30",
+    "@types/node": "^22.19.7",
     "@types/react": "^19.2.10",
     "@types/react-dom": "19.2.3",
     "@vitest/eslint-plugin": "^1.6.6",