Small follow-up to #9018.
Note (especially @GeoffreyBooth): these version constraints do two things:
(1) specify a minimum version, and (2) fix the major version. In other
words, the coffeescript package should not need to be republished when we
publish new minor versions of these core packages in Meteor 1.5.2 or 1.6.
When/if we publish a new major version of these packages, the coffeescript
package can simply bump its version constraints, but that probably won't
happen any time soon. I think that's reasonable because a major version
bump suggests there are some significant changes that need to be
acknowledged by dependent packages.
They depend on core packages like caching-compiler, but coffeescript-compiler
can remain in non-core, so it can update more frequently as npm coffeescript
gets updated.
As discussed in https://github.com/meteor/meteor/pull/8777 it seems best
to always have the suffix on npm-wrapper packages.
If anything, as a reminder when bumping the version on wrapper packages,
but also just to generally make it more clear if a version suffixed with
`_1` is actually higher than a non-suffixed version or not.
