Log Message:
nghttp3: updated to 1.0.0

nghttp3 v1.0.0

Add dependabot to update actions
Bump actions/checkout from 3 to 4
Add release script
cmake: speed up warning option detection
cmake: delete unused detections, add missing #define
Replace the deprecated std::result_of with std::invoke_result
Use sphinx_rtd_theme
Remove ExtractValidFlags as we did in ngtcp2
cmake: Enable werror