Bump version to 2.2.1 and update changelog

Patch release for the two dynamic input fixes that landed after 2.2.0:
clearing a key/value pair corrupting the node, and workflows recreated from
a produced image/video losing their extra pairs. The changelog section
doubles as the release notes for the Comfy registry, which the publish
workflow extracts from CHANGELOG.md.

CHANGELOG.md

@@ -5,6 +5,22 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.2.1] - 2026-11-03
+
+Fixed:
+- Dynamic input nodes (e.g. "create DICT"): clearing a key/value pair could
+  leave the node with input names and widget names out of sync. The prompt was
+  then built from the stale widget names, so the container was created empty
+  and the connection was drawn next to the wrong row. Removed widgets are now
+  also removed from ComfyUI's widget value store, which keeps both in sync.
+- Dynamic input nodes (e.g. "create DICT" and "create LIST") lost their extra
+  key/value pairs when the workflow was recreated by dragging a produced image
+  or video back into ComfyUI: the workflow that ComfyUI embeds into those files
+  drops unconnected widget inputs, and for these nodes that slot is what keeps
+  a pair alive, so the values ended up on the wrong rows and the container was
+  created with only its first entry. The dynamic inputs are now kept in that
+  embedded workflow, also for workflows that were saved before this fix.
+
 ## [2.2.0] - 2026-10-16
 
 Added:

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "basic_data_handling"
-version = "2.2.0"
+version = "2.2.1"
 description = """Basic Python functions for manipulating data that every programmer is used to, lightweight with no additional dependencies.
 
 Supported data types: