Just bumped my package versions and received the following deprecation on build:
DEPRECATION: Ember CLI addons manage their own module transpilation during the treeForAddon processing. ember-cli-workbox (found at /proj_dir/node_modules/ember-cli-workbox) has overridden the this.options.ember-cli-babel options which conflicts with the addons ability to transpile its addon/ files properly. Falling back to default babel configuration options.
Just bumped my package versions and received the following deprecation on build:
Possibly related to https://github.com/babel/ember-cli-babel/issues/136
Versions: ember-source 3.19 ember-cli 3.19 ember-cli-babel 7.21.0 @babel/core 7.10.4