Add a build.yaml to disable dart2js optimisation (#196)
Add a build.yaml to disable dart2js optimisation (#196)

* Add a build.yaml to disabe dart2js optimisation

This will give better stack traces in the pre-built version while it's in development/preview.

* Update build.yaml

flutter/devtools,flutter/devtools,flutter/devtools,flutter/devtools,flutter/devtools,flutter/devtools,flutter/devtools,flutter/devtools,flutter/devtools