update to new sdk

src/FileSystemAdapter.js

@@ -45,6 +45,15 @@ export default class FileSystemAdapter extends BaseNotesAdapter {
         await fs.unlink(filePath)
     }
 
+    async testConnection() {
+        try {
+            await fs.access(this.notesDir)
+            return true
+        } catch (error) {
+            return false
+        }
+    }
+
     async _write(note) {
         const filePath = path.join(this.notesDir, `${note.id}.json`)