Add ColumnOperators.__hash__ (fixes #262) (#263)

Restore default for column_valued name parameter (#260)

Commit 20436f7 (#258) incorrectly
removed this default, which is needed to accept calls without a name,
i.e., .column_valued().

Fixes #259.

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

Add joins_implicitly as arg to column_valued() (#258)

ext/mutable/MutableBase: fix coerce type (#256)

* tests: add test for issue #255

* ext/mutable/MutableBase: fix coerce type
Fixes #255

open up Mapped.__set__ for mypy 1.2 (#253)

We are getting errors in 1.4 mypy due to the Mapped.__set__ method
being too specific in some way:

    [classic@photon3 sqlalchemy:rel_1_4]$ PYTHONPATH=~/dev/sqlalchemy/lib/:~/dev/sqlalchemy2-stubs/ mypy test/ext/mypy/files/dataclasses_workaround.py
    test/ext/mypy/files/dataclasses_workaround.py:34: error: Unsupported "__set__" in "Mapped"  [misc]
    test/ext/mypy/files/dataclasses_workaround.py:35: error: Unsupported "__set__" in "Mapped"  [misc]
    test/ext/mypy/files/dataclasses_workaround.py:36: error: Unsupported "__set__" in "Mapped"  [misc]
    test/ext/mypy/files/dataclasses_workaround.py:37: error: Unsupported "__set__" in "Mapped"  [misc]
    test/ext/mypy/files/dataclasses_workaround.py:38: error: Unsupported "__set__" in "Mapped"  [misc]
    test/ext/mypy/files/dataclasses_workaround.py:59: error: Unsupported "__set__" in "Mapped"  [misc]
    test/ext/mypy/files/dataclasses_workaround.py:60: error: Unsupported "__set__" in "Mapped"  [misc]
    test/ext/mypy/files/dataclasses_workaround.py:61: error: Unsupported "__set__" in "Mapped"  [misc]
    Found 8 errors in 1 file (checked 1 source file)

Open this up to avoid errors.

get last 1.4 version not v2 (#252)

Update pipeline versions

fix Insert.on_conflict_do_nothing return type (#246)

Allow with_variant to take TypeEngine instance like Column. (#245)

Fixes Fixes: #244

AsyncSession: correct (stream_)scalars arg name (#238)

The execute parameters argument is named 'params', not 'parameters'.
See the [`AsyncSession.scalars()`][1] and
[`AsyncSession.stream_scalars()`][2] implementations.

Fixes #230

[1]: https://github.com/sqlalchemy/sqlalchemy/blob/a84f474051cae710e33b3d9486194ed534fe0167/lib/sqlalchemy/ext/asyncio/session.py#L249-L256
[2]: https://github.com/sqlalchemy/sqlalchemy/blob/a84f474051cae710e33b3d9486194ed534fe0167/lib/sqlalchemy/ext/asyncio/session.py#L338-L345