Stop using deprecated BaseQuery

[FrostyX]

Fix #84

>>> from flask_sqlalchemy import BaseQuery
DeprecationWarning: 'BaseQuery' has been moved and renamed to
'query.Query'. The top-level import is deprecated and will be
removed in Flask-SQLAlchemy 3.1.

[FrostyX]

I am not sure if I am reading the test outputs correctly. Some older python version fails with

  File "/github/workspace/flask_whooshee.py", line 18, in <module>
    from flask_sqlalchemy.query import Query
ModuleNotFoundError: No module named 'flask_sqlalchemy.query'

Is it still relevant? Should I make the import conditional? The other tests starts fine but then they are canceled, I don't know about this (probably to save resources since the other test already failed?).

[greyli]

The flask_sqlalchemy.query module was introduced in the 3.0.0 version, which requires Python > 3.7. That's why the tests for Python 3.6 failed. I would recommend using the following way to import the query class:

try:
    from flask_sqlalchemy.query import Query
except ImportError:
    from flask_sqlalchemy import BaseQuery as Query

Fixed in eac6dd2 (#85)

[greyli]

Merged, thanks!