Hi, everyone!
A new version of the Asset Store Publishing Tools has just been released. This update focuses primarily on the validation improvements following the recent Submission Guidelines update.
Here are the key changes:
Uploader Changes
- Added the option to validate a pre-exported package
- Added the option to export a .unitypackage file without uploading
- Updated the dependency selection UI
Validator Changes
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Added the option to validate several asset paths at once
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Note: when validating a package that is comprised of several folders (e.g. Assets/MyPackage + Assets/StreamingAssets + Assets/WebGLTemplates), please select all applicable paths that would be included in the package
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Added several new validation tests for:
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File Menu Names
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Compressed files
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Model Types
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Texture Dimensions
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Particle Systems
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Normal Map Textures
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Audio Clipping
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Path Lengths
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Script Compilation
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Updated validation test severities based on package category
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Updated validation tests to each have their own test logic class
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Updated validation tests are to be displayed in alphabetical order
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Fixed several issues with the namespace check test
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Fixed scenes in ‘Samples~’ folders not being taken into account for the sample scene check test
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Other internal changes
Exporter Changes
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Package exporter is now a separate module (similar to Uploader and Validator)
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Fixed hidden folders being included when exporting package content
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Note: this prevents an issue with the Unity Editor, where exported hidden folders would appear in the Project window as empty folders when imported, despite having content on disk. Content nested within hidden folders is still collected, provided it contains unique .meta files
When updating Asset Store Tools from the Package Manager, don’t forget to remove the existing old version from the project before importing the new one (V11.3.0) ! 
If you encounter any issues, please let us know in the comments or report a bug using the Unity Editor!