Write about it and let search engines do their thing. There's pretty much no success in advertising a package/library - not many people randomly browse for pac

Write about it and let search engines do their thing. There's pretty much no success in advertising a package/library - not many people randomly browse for packages and even if they stumble upon yours they'd probably forget about it the next day before they find an use-case for it. Even paid ads wouldn't work. People who actually have a problem to solve however will search for it, hopefully find your article and if you it's a good fit they will use it.