Post language switcher, used to switch between different languages of a single post

Example:
```js
const postHasParent = false;
const humanTranslation = false;
const language = 'en';
const languagePrefix = '';
const slugPrefix = 'solution_article'
const translations = [
];
translations['en'] = null;
translations['es'] = {
  canonical_url: 'test-es-url',
  post_id: '999',
  post_name: 'test-es-name'
};
translations['fr'] = {
   canonical_url: 'test-fr-url',
   post_id: '9999',
   post_name: 'test-fr-name'
 };

<PostLanguageSwitcher
  postHasParent={postHasParent}
  humanTranslation={humanTranslation}
  language={language}
  translations={translations}
  languagePrefix={languagePrefix}
  slugPrefix={slugPrefix}
 />
```