v2.7.0

What's new

• Add support for x-default by @aerni in #156

What's fixed

• Fix exception when seo_generate_social_images field is missing by @aerni in #157
• Fix exception when a selected canonical entry is unpublished by @aerni in #161
• Fix wrong variable type check by @aerni in #162
• Fix GraphQL exception caused by canonical entry by @aerni in #163
• Fix parsing of Antlers variables by @aerni in #160
• Fix custom sitemaps by declaring class properties by @aerni in #164