New forms of parameters

[vallemar]

I really like how vue does it,
like this: https://kazupon.github.io/vue-i18n/guide/formatting.html#named-formatting

const messages = {en: { hello: '{msg} world'}}
 $t('hello', { msg: 'hello' })

and like this: https://kazupon.github.io/vue-i18n/guide/formatting.html#list-formatting

const messages = {en: { hello: '{0} world'}}
 $t('hello', ['hello'])

If there is a PR, will it be accepted or does it not see the improvement?