v6.6.0

Features

• Added cookieDomain option to override locale cookie's domain (#599) (7525cd7)
• seo: additional catchall hreflang tags (#597) (ebd2213), closes #522
• support external configuration file for vue-i18n options (#605) (c55bc6a), closes #585 #237

Bug Fixes

• sync store locale before triggering onLanguageSwitched listener (#609) (9b699cf), closes #556