Correct the example VueI18n Integration (#1905)
Correct the example VueI18n Integration (#1905)

Currently the example won't work without the line:
159: i18n.locale = "en"; // set a default locale (without it, it won't work)

For description look here https://github.com/baianat/vee-validate/issues/1891
and/or here
https://stackoverflow.com/questions/55045730/vue-i18n-integration-by-vee-validate-not-working-as-described-in-the-documentati

🔎 __Overview__

Explain the premise for adding this PR and why is it important.

Ex (Feat):
> This PR {adds/fixes/improves} the {feature/bug/something}.

Ex (Locale):
> This PR changes the {locale} messages style because {reason}

🤓 __Code snippets/examples (if applicable)__

```js
// some code
```

✔ __Issues affected__

list of issues formatted like this:

> closes #{issue id}

logaretm/vee-validate,baianat/vee-validate,baianat/vee-validate,baianat/vee-validate,logaretm/vee-validate,logaretm/vee-validate