Errors out with babel 6

[igorT]

If you run this in a repo that has ember-cli-babel 6, you will get a random looking error
Build failed.
Build Error (broccoli-persistent-filter:Babel > [Babel: @ember/test-helpers]) in monkey-patches.js

Cannot find module '@babel/helper-call-delegate'
Require stack:

• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/plugin-transform-parameters/lib/params.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/plugin-transform-parameters/lib/index.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/preset-env/lib/available-plugins.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/preset-env/lib/index.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/core/lib/config/files/plugins.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/core/lib/config/files/index.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/core/lib/index.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/broccoli-babel-transpiler/lib/worker.js

Build failed.
Build Error (broccoli-persistent-filter:Babel > [Babel: @ember/test-helpers]) in monkey-patches.js

Cannot find module '@babel/helper-call-delegate'
Require stack:

• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/plugin-transform-parameters/lib/params.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/plugin-transform-parameters/lib/index.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/preset-env/lib/available-plugins.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/preset-env/lib/index.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/core/lib/config/files/plugins.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/core/lib/config/files/index.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/@babel/core/lib/index.js
• /Users/iterzic/code/ember-data-model-fragments/node_modules/@ember/test-helpers/node_modules/broccoli-babel-transpiler/lib/worker.js

It would be nice to error out with a nicer error message.

[rwjblue]

Ya, we can definitely make a better error message.