New features

Issue #2252839: Include class name when showing exceptions
Issue #2804083: Do not store hash when an item fails to import
Issue #2630862: handleDedupe() fails on falsy values
Issue #2900303: Handle empty idlist in MigrateSourceList (list.inc)

Initial Beta Release of OpenAPI module.

• Simplified regions
• Extended templates: collapsable menu
• SASS introduction

• Issue #2956118: Initial structure for [Vartheme Material Admin] theme 8.x-5.x

• Issue #2956099: Initial structure for [Vartheme Admin] theme 8.x-5.x

In this release lots of bugs have been fixed, including ones that did cause fatal errors!

One of the bugs that were fixed was that deleting a field used in mapping caused the mapping page and the import to crash. This is fixed by declaring dependencies on fields that are used in mapping. Be sure to run database updates so all your feed types get these dependencies calculated.

There are also two big new features in this release:

1. A generic content entity processor, allowing you to import content for a whole lot more content entity types!
2. FeedsSource plugins, with which you can add in additional sources, above the "main" source.