Fix CMake configuration for MSVC

[oocytanb]

This PR will enable to build on Windows MSVC.

My environment:

• Windows 10 (x64)
• Visual Studio 2019

[r9y9]

Thanks for doing this! We'd need to update CI for this repo using Github actions like https://github.com/r9y9/sinsy/blob/d8fd837b2ff1bd2e03f98e9e53d36c19e491d5ea/.github/workflows/ccpp.yaml.

If you can look into it, that would be great. Or I may look into it when I get some time.

[oocytanb]

Thank you for your reply.
I am trying to make configuration for GitHub actions.
See PR #4

[oocytanb]

PR #4 のマージありがとうございます。
こちらは Close させていただきますね。