Bump node via nvm version and @types/node to v22

Since node 18 is in maintenance mode (ending mid next year) and v22 is
the current LTS release https://endoflife.date/nodejs

Should have no consequence for end users.

.nvmrc

@@ -1 +1 @@
-v18
+v22

package.json

@@ -144,7 +144,7 @@
     "@tiptap/suggestion": "^2.0.4",
     "@types/encodeurl": "^1.0.0",
     "@types/lodash": "^4.14.195",
-    "@types/node": "^18.16.3",
+    "@types/node": "^22.9.0",
     "@types/react": "^18.2.12",
     "@types/react-dom": "^18.2.5",
     "@typescript-eslint/eslint-plugin": "^5.62.0",