New Feature

• Added support for anyOf/oneOf in uiSchemas in the MultiSchemaField, see documentation

@rjsf/core

• Added support for anyOf/oneOf in uiSchemas in the MultiSchemaField, fixing #4039
• Fix potential XSS vulnerability in the preview button of FileWidget, fixing #4057

@rjsf/utils

• #4024 Added base64 to support encoding and decoding using the UTF-8 charset to support the characters out of the Latin1 range.
• Updated enumOptionsValueForIndex() to fix issue that filtered enum options with a value that was 0, fixing #4067
• Changes the way of parsing the data URL, to fix #4057

Dev / docs / playground

• #4024 Updated the base64 references from (atob and btoa) to invoke the functions from the new base64 object in @rjsf/utils.
• Updated the uiSchema.md documentation to describe how to use the new anyOf/oneOf support