NuGet DLLs depend on MSVC runtime libraries

[JupiterRider]

Hello,

I noticed that the Windows DLLs in the new CSFML NuGet packages depend on the MSVC runtime libraries (msvcp140.dll, vcruntime140.dll, etc.). CSFML 2.* didn't.

I'm afraid that this will lead to DllNotFoundExceptions and confusion for some users.

I used python-pefile to list the dependencies:

>>> import pefile
>>> pe = pefile.PE("CSFML.3.0.0-rc.2/runtimes/win-x64/native/csfml-graphics.dll")
>>> for entry in pe.DIRECTORY_ENTRY_IMPORT:
...     print(entry.dll)
...     
b'sfml-graphics-3.dll'
b'sfml-window-3.dll'
b'sfml-system-3.dll'
b'MSVCP140.dll'
b'VCRUNTIME140.dll'
b'VCRUNTIME140_1.dll'
b'api-ms-win-crt-heap-l1-1-0.dll'
b'api-ms-win-crt-string-l1-1-0.dll'
b'api-ms-win-crt-runtime-l1-1-0.dll'
b'api-ms-win-crt-locale-l1-1-0.dll'
b'KERNEL32.dll'
>>> pe = pefile.PE("CSFML.2.6.0/runtimes/win-x64/native/csfml-graphics.dll")
>>> for entry in pe.DIRECTORY_ENTRY_IMPORT:
...     print(entry.dll)
...     
b'OPENGL32.dll'
b'WINMM.dll'
b'GDI32.dll'
b'KERNEL32.dll'
b'USER32.dll'
b'ADVAPI32.dll'
>>>```

[eXpl0it3r]

Fixed with #412