0.11.x -> 0.12.x

Last updated on 2021-2-25 by Haonan Hou

Update：

Latest Changes
Change iotdb_version=0.11.x to 0.12.x
Add virtual_storage_group_num (#2405)
Add time_encoder (#2621)

0.10.x -> 0.11.x

Last updated on 2020-11-5 by Haonan Hou

Update：

Latest Changes
Change iotdb_version=0.10.x to 0.11.x