Add note about types to upgrade guide

vweevers · vweevers · commit 9cefb83878f6 · 2025-04-20T16:52:24.000+02:00
Category: none
diff --git a/UPGRADING.md b/UPGRADING.md
@@ -50,3 +50,5 @@ You must now do:
 ```js
 const keys = new KeyStream(db)
 ```
+
+For TypeScript users: you will also need to `npm install @types/readable-stream`.
