t function with plurals returns type never after migrating to v21.x.x

[wolkyura]

🐛 Bug Report

After upgrading i18next to latest version from 20.x.x version, t('ns:key', { count: 1 }) function with count option always returns value with type never (on version 20.x.x - string as expected)

To Reproduce

{
  "key_one": "value",
  "key_other": "values"
}

const { t } = useTranslation(['common']);
const value = t('common:key', { count: 10 }); // type of value - `never`

react-18next.d.ts:

import { resources } from './i18n';

declare module 'react-i18next' {
  interface CustomTypeOptions {
    resources: typeof resources['en'];
  }
}

i18n.ts:

import i18n from 'i18next';
import detector from 'i18next-browser-languagedetector';
import { initReactI18next } from 'react-i18next';

import { en } from './locales/en';

export const resources = {
  en,
} as const;

i18n
  .use(detector)
  .use(initReactI18next)
  .init({
    interpolation: {
      escapeValue: false,
    },
    lng: 'en',
    resources,
  });

export default i18n;

Expected behavior

I would expect string type of returning value t('common:key', { count: 10 })

const { t } = useTranslation(['common']);
const value = t('common:key', { count: 10 }); // type of value - `string`

Your Environment

• runtime version: node v14
• i18next version: 21.6.6
• react-i18next: 11.15.3,
• os: Mac

[pedrodurek]

Hey @wolkyura, that's definitely a bug, I'll try to fix it today

[adrai]

fixed with v11.15.5