Hi @doushubao1984 ,
Welcome Back to Dgraph Community !
Yes, it is true that there will no be v2.0 . In March of this year, Dgraph moved to Calendar Versioning of its products from Semantic versioning. You may read the related blog post over here .
All Dgraph releases are supported for 1 year from the date of its first release. You may read more about our releases and their end of life over here.
Current latest release series is v20.07.X which will be supported until July 2021.