[Addons] make _registerHelper public

[bcardarella]

I am using _registerHelper in several addons to get around the hyphenation requirement. can we get we get this method to be made public?

[mmun]

@bcardarella We're not going to expose that method because it exposes streams. @mixonic and @rwjblue have an RFC detailing the path to hyphenless helpers: emberjs/rfcs#58.

TL;DR: Helpers should not require a hyphen. Hyphens are only for custom elements. But we need to implement a strategy that avoids tons of unnecessary container lookups (which is what the RFC details) before we can allow it.

[bcardarella]

@mmun what are the odds that this RFC is going to land for 2.0? Without a clear path on how my addons will work in 2.0 I'm pretty much stuck. Its nice that there is an RFC to add a better API for this eventually but in the meantime I don't think I can update my addons and test them against 1.13 in any way

[rwjblue]

@bcardarella we are planning on to landing both emberjs/rfcs#53 and emberjs/rfcs#58 in 1.13.0.

[bcardarella]

this is good news, thank you

[samtsai]

@bcardarella looks like we can try confirming that your addons work with the helper updates that landed in 1.13 and close this issue out if all good.

[mmun]

Thanks @samtsai.