Updates release notes for PR #106

.release-notes/next-release.md

@@ -0,0 +1,35 @@
+## Change HTTPClient handler factory creation
+
+The handler factory for creating handlers for new requests is now provided in the constructor of the client instead of the apply method. This makes it more clear, that the client will use the same handler for all requests.
+
+The old version would look similar to this:
+
+```pony
+let client = HTTPClient(auth)
+
+// Later
+let handler_factory = ...
+
+client(payload, handler_factory)?
+
+// Even later
+client(other_payload, other_factory)
+```
+
+In the new version the handler factory needs to be supplied at the creation of the client:
+
+```pony
+let handler_factory = ...
+let client = HTTPClient(auth, handler_factory)
+
+client(payload)
+
+// This will use the handler_factory
+client(other_payload)
+
+// To use a different handler factory, create a new client
+
+let other_client = Client(auth, other_factory)
+other_client(other_payload)
+```
+