fix: Fix install of regorus_ffi C++ bindings (#449) #56

Job	Run time
Build Regorus FFI: (x86_64-unknown-linux-gnu)	1m 57s
Build Regorus FFI: (x86_64-pc-windows-msvc)	3m 59s
Build Regorus nuget	23s
Test Regorus Nuget: (x86_64-pc-windows-msvc)	2m 2s
Test Regorus Nuget: (x86_64-unknown-linux-gnu)	34s
	8m 55s

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