fix: process.env may not exist on vite.

Author: xiCO2k

src/index.ts

@@ -138,7 +138,7 @@ function setLanguage({ lang, messages }: LanguageInterface): string {
  * It resolves the language file or data, from direct data, require or Promise.
  */
 async function resolveLang(callable: Function, lang: string): Promise<LanguageJsonFileInterface> {
-  const hasPhpTranslations = process.env.LARAVEL_VUE_I18N_HAS_PHP;
+  const hasPhpTranslations = process && process.env ? process.env.LARAVEL_VUE_I18N_HAS_PHP : false;
   const data = callable(lang)
 
   if (data instanceof Promise) {