Bump to 2.1.12 (tikv#4879)

raftstore: sync all cf files of received snapshots (tikv#4807) (tikv#…

…4811)

Signed-off-by: qupeng <[email protected]>

cop: Support empty aggr fn in batch aggr executor (cheery pick tikv#4782

) (tikv#4783)

Signed-off-by: Breezewish <[email protected]>

Bump to v2.1.10 (tikv#4728)

Bump to 3.0.0-rc.1 (tikv#4681)

Signed-off-by: nolouch <[email protected]>

Bump to v2.1.9 (tikv#4633)

* Bump to v2.1.9

Signed-off-by: Neil Shen <[email protected]>

* Update CHANGELOG.md

Co-Authored-By: overvenus <[email protected]>
Signed-off-by: Neil Shen <[email protected]>

Bump to 2.1.8 (tikv#4522)

Signed-off-by: nolouch <[email protected]>

Bump to 3.0.0-beta.1 (tikv#4432)

Signed-off-by: Neil Shen <[email protected]>

Bump to 2.1.6 (tikv#4377)

Signed-off-by: Neil Shen <[email protected]>

Bump to 2.1.5 (tikv#4294)

Signed-off-by: nolouch <[email protected]>