Allow specifying babel config from addon

[anlumo]

_babelTranspile in lib/service-worker-builder.js specifies its own babel config. Unfortunately, my configuration is very different (for example, I need the syntax-object-rest-spread plugin). I don't see a way to adjust this configuration from the outside.

[anlumo]

Just discovered that there's the same issue with rollup.

[eshtadc]

Actually - it looks like the _babelTranspile only transpiles the trees for the service worker plugins and service worker files. The configuration set there doesn't apply to the application code.

[anlumo]

I've made some commits in my fork that fixes the issues with es6: https://github.com/anlumo/ember-service-worker/commits/master

They're not ready for contributing upstream, but they do show where the screws have to be replaced. The broccoli-uglify-sourcemap update is pretty important.

[eshtadc]

@anlumo You should check the latest master - there are a bunch of dependency updates that were completed in the last few days. Would love to hear how this works for you as a beta prior to releasing a next version.

[eshtadc]

@anlumo Following up on this again. I'm still pretty sure that the transpile here shouldn't affect your application level files, but would love confirmation. Could you confirm and test with the latest version?