Limit the amount of dependencies for this package

[Thundernerd]

When trying to follow the installation steps for this package on the openupm website you're shown a (relatively) big list of dependencies for this package.

Having a dependency here or there isn't the end of the world but having a dependency on System.Buffers, System.Memory, System.Numerics.Vectors, and especially System.Runtime.CompilerServices.Unsafe is a bit ridiculous.

[lgarczyn]

Same issue, it also led to conflicts with other packages since those dependencies are pretty old. If you found a solution or a good fork, please let me know

[lgarczyn]

I've cobbled a solution together, just replace the SolidAlloy dependencies with these forks:

"com.solidalloy.type-references": "https://github.com/Oxydiz/ClassTypeReference-for-Unity.git",
"com.solidalloy.unity-dropdown": "https://github.com/lgarczyn/UnityDropdown.git",
"com.solidalloy.util": "https://github.com/Oxydiz/SolidUtilities.git",