Suggestion: Accept arrays in files

[andrrms]

Accept arrays in translation files. In that case, a random string would be selected.
Example:

// en.json
{
  "hello": [
    "Hello, user!",
    "Hey!",
    "World"
  ]
}

// bot.js
ctx.command("hello", (ctx) => {
  ctx.reply(ctx.i18n.t("hello")) // Hello, user!
  ctx.reply(ctx.i18n.t("hello")) // World
  ctx.reply(ctx.i18n.t("hello")) // Hey!
  ctx.reply(ctx.i18n.t("hello")) // World
})