Merge error: Pass option { overwrite: true } to mergeTrees in order to have the latter file win.

[VolodyaCm]

After upgrading ember to 3.15.1

How pass overwrite: true to mergeTrees?

I found similar issue here #109, But I did not find a solution.

Error:

(node:7137) UnhandledPromiseRejectionWarning: Error: [BroccoliMergeTrees] error while merging the following:

1. [BroccoliMergeTrees: Application Dist]
2. [Funnel]
   Merge error: file assets/web-workers/web-worker.js exists in /tmp/broccoli-7137h4FQvjVBxXVy/out-543-broccoli_merge_trees_application_dist and /tmp/broccoli-7137h4FQvjVBxXVy/out-545-funnel
   Pass option { overwrite: true } to mergeTrees in order to have the latter file win.
   at MergeTrees._getMergedDirectory2 (/mnt/s/pr/pjc/ember-app/node_modules/ember-cli/node_modules/merge-trees/index.js:151:19)
   at MergeTrees._getMergedDirectory2 (/mnt/s/pr/pjc/ember-app/node_modules/ember-cli/node_modules/merge-trees/index.js:174:33)
   at MergeTrees._getMergedDirectory2 (/mnt/s/pr/pjc/ember-app/node_modules/ember-cli/node_modules/merge-trees/index.js:174:33)
   at MergeTrees._getMergedDirectory (/mnt/s/pr/pjc/ember-app/node_modules/ember-cli/node_modules/merge-trees/index.js:40:17)
   at MergeTrees.merge (/mnt/s/pr/pjc/ember-app/node_modules/ember-cli/node_modules/merge-trees/index.js:27:20)
   at BroccoliMergeTrees.build (/mnt/s/pr/pjc/ember-app/node_modules/ember-cli/node_modules/broccoli-merge-trees/index.js:36:21)
   at resolve (/mnt/s/pr/pjc/ember-app/node_modules/ember-cli/node_modules/broccoli/dist/wrappers/transform-node.js:68:45)
   at new Promise ()
   at TransformNodeWrapper.build (/mnt/s/pr/pjc/ember-app/node_modules/ember-cli/node_modules/broccoli/dist/wrappers/transform-node.js:53:16)
   at Promise.resolve.then.then.then (/mnt/s/pr/pjc/ember-app/node_modules/ember-cli/node_modules/broccoli/dist/builder.js:99:36)
   (node:7137) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 6)
   (node:7137) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.