Version bump of SQLAlchemy 1.4

[jsmolina]

Is your feature request related to a problem? Please describe. SQLAlchemy was launched on March 2021

Describe the solution you'd like Gino should be able to support 1.4 version of SQLAlchemy.

[dnikolayev]

Sorry, please don't get it as a push, just want to get know if there are plans about Alchemy 1.4+ support.

[Pentusha]

@dnikolayev https://github.com/python-gino/gino/discussions/799

[dnikolayev]

Thanks, @Pentusha Looks like a problem. @fantix is the only one Maintainer, right?

[vvanglro]

Will be upgraded to sqlalchemy 1.4? Because I encountered a sqlalchemy version conflict when using gino 😔