Unnecessary package duplication

[ef4]

If you install ember-cli-fastboot 4.1.5, you will always get two different versions of fastboot in your dependency graph:

ember-cli-fastboot 4.1.5
├── fastboot 4.1.5
└─┬ fastboot-express-middleware 4.1.2
  └── fastboot 4.1.2

This is because workspace:* dependencies become exact version matches when published.

It would probably be better to use workspace:^.

[SergeAstapov]

Related PR #948

i can update it with suggestion to use caret everywhere

[mansona]

@SergeAstapov yes if you update it to a ^ everywhere, I would merge that 👍

I wasn't confident enough to merge your other PR because I didn't have a real example of the effect, and Ed's example shows that we probably want to minimise the duplication 👍