With these changes, GitHub users can compile the latest version using GitHub Actions without install VapourSynth and compilation tools on their computers, getting Linux and Windows libraries with the VapourSynth version of their choice (README is updated with instructions), so it's very easy test the code with different VapourSynth versions.
No need to compile if text files are changed
Update actions to avoid warnings about deprecated actions
Update to VapourSynth R61 using environment variable
Add Windows build
Upload compiled Linux and Windows stripped libraries
Add manual trigger to test compilation with other branches
With these changes, GitHub users can compile the latest version using GitHub Actions without install VapourSynth and compilation tools on their computers, getting Linux and Windows libraries with the VapourSynth version of their choice (README is updated with instructions), so it's very easy test the code with different VapourSynth versions.