error messageshelp wanted
描述
Below is a warning @eben-roux came across when using can-validate-validatejs: https://gitter.im/canjs/canjs?at=5aec8531da323a7c04f8b333

The issue was that he had validate.js 0.12 installed in his project but can-validate-validatejs needed ^0.11.1
From the info provided in the warning, it seems like steal could maybe detect this scenario and offer a better warning. An idea that needs some work:
Multiple versions of the module with address ~/node_modules/validate.js/validate.js are being imported.
Modules:
validate.js@0.12.0#validate
- ~/src/main.js
validate.js@0.11.1#validate
- can-validate-validatejs
HINT: Check the semver ranges of your project and its dependencies.
Learn more at https://stealjs.com/docs/StealJS.error-messages.html#multiple-versions