NOTE: MercurySQL will be imported from M.SQL in it's v1.0.0 version.

before v1.0.0, you should import like this:
```py
import MercurySQL
```
after v1.0.0, you should import like this:
```py
import M.SQL
```

@lanbinleo 's idea

Note that we plan to release the v1.0.0 version when the code & functionality is stabled. Estimate time: 100 years. I'm serious