Changelog v4.5.6: fix FeatureTestTrait#call

Author: 3ynm

user_guide_src/source/changelogs/v4.5.6.rst

@@ -30,6 +30,8 @@ Deprecations
 Bugs Fixed
 **********
 
+**FeatureTestTrait:** Allows `#call` and `#post` to process JSON lists. It failed because `RequestTrait#fetchGlobal` expected the second parameter ($index) to be an associative array.
+
 See the repo's
 `CHANGELOG.md <https://github.com/codeigniter4/CodeIgniter4/blob/develop/CHANGELOG.md>`_
 for a complete list of bugs fixed.