please help release tags for easy installing

[cxwx]

I made a homebrew formula for easy installing the repo.

brew install  --HEAD cxwx/cxbrew/gplotpp

better please release tags like v1.0.0, v0.1.0 ...
so it will automatically upgrade for each release

[ziotom78]

Done: https://github.com/ziotom78/gplotpp/releases/tag/v1.0.0. Thanks for the Homebrew recipe!