fix: nullable chain for getting locales (#49)

Author: th1m0

packages/module/src/module.ts

@@ -195,7 +195,7 @@ declare global {
       // @ts-expect-error untyped
       const baseUrl = nuxt.options.i18n?.baseUrl
       // @ts-expect-error untyped
-      const locale = nuxt.options.i18n?.locales.find(l => l.code === nuxt.options.i18n?.defaultLocale)
+      const locale = nuxt.options.i18n?.locales?.find(l => l.code === nuxt.options.i18n?.defaultLocale)
       updateSiteConfig({
         _context: '@nuxtjs/i18n',
         url: typeof baseUrl === 'string' ? baseUrl : undefined,