This fixes this deprecation: ember-polyfills.deprecate-merge

I was wrong that the merge deprecations were all gone,
this was producing one too. I don’t know why Greenkeeper
isn’t suggesting updates…?

ember-intercom-io is also using merge, but I had to revert
its update yesterday. I’ll look into that. When I replaced
merge with assign directly in node_modules, there were
no more warnings about this deprecation. 🎉

This fixes this deprecation:
https://deprecations-app-prod.herokuapp.com/deprecations/v3.x/#toc_transition-state

This fixes this deprecation:
https://deprecations-app-prod.herokuapp.com/deprecations/v3.x/#toc_deprecate-router-events

Since Sinon was only being used in one place, I rewrote things
to fix this deprecation:
https://deprecations-app-prod.herokuapp.com/deprecations/v3.x/#toc_getting-the-each-property

I’ve tried this before and was unable to deploy, now is the
moment when I’ll see if I can fix that. Because this rids
us of this deprecation:
https://deprecations-app-prod.herokuapp.com/deprecations/v3.x/#toc_ember-polyfills-deprecate-merge

I don’t know what changed in package-lock.json but now
I think deployments might succeed…? 🧐

…eper/ember-source-3.6.0

what is happening

# Conflicts:
#	package-lock.json
#	package.json

# Conflicts:
#	package-lock.json
#	package.json
#	tests/unit/services/live-updates-record-fetcher-test.js

There was a warning that the older version wasn’t compatible
with this version of ember-cli-babel.

We already have babel.includePolyfill so I think this
is superfluous.

The ember-concurrency documentation says:
“you should probably only enable this configuration in
a development environment”

This fixes this deprecation:
https://emberjs.com/deprecations/v3.x/#toc_events-remove-all-listeners

Thanks to @Turbo87 and @rwjblue for the guidance in
#dev-ember-js.

This appears to have fixed this problem for me locally…?
babel/broccoli-babel-transpiler#156

# Conflicts:
#	package-lock.json
#	package.json

…???

The last failed deployment had this as the point of failure,
so maybe the newer version that includes ember-cli-babel 7+
will help…??

This is another Ember 3.6-related update.

This appears to silence the volumes of Babel deprecation
warnings such as the one seen here:
https://travis-ci.org/travis-ci/travis-web/builds/477551778#L512

This is another dependency with a newer ember-cli-babel
version.

# Conflicts:
#	package-lock.json

This fixes a Babel 7 interoperation problem.

This seems like a strange change…?