Merge pull request #394 from charlespierce/tree_include_addon

Include addon name directory in 'treeForAddon'

Author: Robert Jackson

index.js

@@ -245,12 +245,16 @@ module.exports = {
       destDir: '@babel/runtime/helpers/esm'
     });
 
-    return this.transpileTree(babelHelpersTree, {
+    const transpiledHelpers = this.transpileTree(babelHelpersTree, {
       'ember-cli-babel': {
         // prevents the helpers from being double transpiled, and including themselves
         disablePresetEnv: true
       }
     });
+
+    return new Funnel(transpiledHelpers, {
+      destDir: this.moduleName(),
+    });
   },
 
   treeForVendor() {