Update the Gee.External.Capstone package

The `Gee.External.Capstone` package ships with a native implementation of Capstone, but the last time they pushed a release was 2022. Since then, we require that native binaries be compiled with more security features that are not present on the binary. This means that when we try and use BDN, it breaks on our binary scanning checks.

The `Gee.External.Capstone` seems to be abandoned, no merges since Jan 2023. A brief search doesn't show any other project that has .Net bindings for the Capstone framework. We could fork that project and put out an updated Nuget with newer native deps, but I am not sure what the maintainers want to do.

@timcassell @AndreyAkinshin @adamsitnik