hope to add r2dbc support in mybatis

[john1337]

hope to add r2dbc support in mybatis,cause it will provide better performance and less db connections

[john1337]

springboot jpa has supported r2dbc for a long time，so when will mybatis add this feature，the current way is not performant

[harawata]

There is an open issue #1444 for R2DBC support.
We will add a comment when there is something to announce.