Revert "changed version to 0.21.0.Beta2-SNAPSHOT"

This reverts commit c915d9302b965641b97a06713e7a039ec0e33f21.
Revert "Revert "changed version to 0.21.0.Beta2-SNAPSHOT""

This reverts commit 703634e349fb987982a492663881282e62d3fdba.