hslua-aeson: update changelog
`hslua-aeson` uses [PVP Versioning][].
+## hslua-aeson-2.2.0
+
+Released 2022-02-19.
+
+- Relaxed upper bound for hslua-core and hslua-marshalling,
+ allowing version 2.2 of both packages.
+
## hslua-aeson-2.1.0
-Released 29-01-2022.
+Released 2022-01-29.
- Update to hslua 2.1.
