Declare whole interface as as public

[frankier]

This is already useful in practice with e.g. https://github.com/ericphanson/ExplicitImports.jl which will give false positives for using private implementation at the moment.

[frankier]

@spaette Cheeky ping.

Hopefully this is an uncontroversial change/easy merge. Let me know if I can add any assurance.

[spaette]

https://discourse.julialang.org/

Perhaps feedback could be solicited on the subject matter from the above online discussion venue for Julia.

[frankier]

Thanks for the information. It is quite a small change so I'll ping @quinnj first, but if there is some problem, I can take it to Discourse if they agree it would be useful.

[spaette]

@oxinabox

Would you consider the subject matter of the PR having implications beyond the scope of a single Julia package?

[spaette]

@quinnj

Time permitting would you provide a second review?