Upgrade torii devDependency to 1.0.0-beta.1

[Gaurav0]

Maintainer edit:

• adds ember-lts-4.8 try scenario.
• bumps torii to the adopted 1.0.0-beta.1 https://github.com/adopted-ember-addons/torii
• bumps packages in the package.jsons for the default ember scenario.

[Gaurav0]

@BobrImperator can you approve running the tests?

[BobrImperator]

Thanks 👍

My concern though is dropping the older ember support, is it necessary?
I'd also prefer to wait for official 1.0.0 release rather than installing beta if possible, this is why we haven't upped this one yet.

[Gaurav0]

I'd also prefer to wait for official 1.0.0 release rather than installing beta if possible, this is why we haven't upped this one yet.

Ok. I'll talk to @halfbyte about releasing a 1.0.

[Gaurav0]

My concern though is dropping the older ember support, is it necessary?

Not for this, as torii is just a devdependency. Once I get tests working otherwise, I'll reenable testing on older versions and use the old version of torii in those ember-try scenarios.