add aliyun odps support (#5)

* add aliyun odps support

fix tests

Use chan to read and write (#1)

* use chan as buffer

* handle errors

* run postgres in github actions

* add sudo

* fix postgres

* run test on github actions

* export DATABASE_URI in test.sh

* upgrade actions/checkout to v3 and setup-go to v4

remove the debug info from the executable to make it smaller