Bug description

The meta file for ResolverUtilities.cs is missing in the respository, rendering it unusable as a directly hooked up package via the Package Manager.

Repro steps

• Create a new Unity Project.
• Add MessagePack via the Package Manager:

"Add Package from git URL"
https://github.com/neuecc/MessagePack-CSharp.git?path=src/MessagePack.UnityClient/Assets/Scripts/MessagePack

Expected behavior

It should work and compile just fine!

Actual behavior

Instead I am greeted with the following message:

Asset Packages/com.neuecc.messagepack/Resolvers/ResolverUtilities.cs has no meta file, but it's in an immutable folder. The asset will be ignored.

And thus

Library\PackageCache\com.neuecc.messagepack@3e624b9499\Resolvers\DynamicObjectResolver.cs(114,55): error CS0103: The name 'ResolverUtilities' does not exist in the current context

Additional context

Yes the installation via the .unitypackage works fine, but I do prefer the usage of the Package Manager which makes updating the asset a lot more convenient.