As of #23867 this is now a real package, so updating the imports to
use the real package name, rather than relying on the alias. The
name change in the package name is because `I18n` is not a valid
name as NPM packages must be all lowercase.
This commit also introduces an eslint rule to prevent importing from
the old I18n path.
For themes/plugins, the old 'i18n' name remains functional.
```
deprecate-shim.js:33 DEPRECATION: You set the 'hasSavedVote' property on a {{hash}} object. Setting properties on objects generated by {{hash}} is deprecated. Please update to use an object created with a tracked property or getter, or with a custom helper. [deprecation id: setting-on-hash]
```
* Use QUnit `module` instead of `discourseModule`
* Use QUnit `test` instead of `componentTest`
* Use angle-bracket syntax
* Remove jQuery usage
* Improve assertions (and actually fix some of them)
Multiple polls can be created without the min attribute but that means
the attribute defaults to 1. A default of 0 does not make any sense
because it is equivalent to saying that a user is not casting any votes.
