fix!: Drop support for SQLAlchemy 1.4 (#1916)

.github/workflows/test.yml

@@ -37,7 +37,7 @@ env:
 
 jobs:
   tests:
-    name: "Test on ${{ matrix.python-version }} (${{ matrix.session }}) / ${{ matrix.os }} / SQLAlchemy: ${{ matrix.sqlalchemy }}"
+    name: "Test on ${{ matrix.python-version }} (${{ matrix.session }}) / ${{ matrix.os }}"
     runs-on: ${{ matrix.os }}
     env:
       NOXSESSION: ${{ matrix.session }}
@@ -47,11 +47,9 @@ jobs:
         session: [tests]
         os: ["ubuntu-latest", "macos-latest", "windows-latest"]
         python-version: ["3.8", "3.9", "3.10", "3.11"]
-        sqlalchemy: ["2.*"]
         include:
-        - { session: tests,   python-version: "3.11", os: "ubuntu-latest", sqlalchemy: "1.*" }
-        - { session: doctest, python-version: "3.10", os: "ubuntu-latest", sqlalchemy: "2.*" }
-        - { session: mypy,    python-version: "3.8",  os: "ubuntu-latest", sqlalchemy: "2.*" }
+        - { session: doctest, python-version: "3.10", os: "ubuntu-latest" }
+        - { session: mypy,    python-version: "3.8",  os: "ubuntu-latest" }
 
     steps:
     - name: Check out the repository
@@ -88,8 +86,6 @@ jobs:
         nox --version
 
     - name: Run Nox
-      env:
-        SQLALCHEMY_VERSION: ${{ matrix.sqlalchemy }}
       run: |
         nox --python=${{ matrix.python-version }}
 

noxfile.py

@@ -87,14 +87,6 @@ def tests(session: Session) -> None:
     session.install(".[s3]")
     session.install(*test_dependencies)
 
-    sqlalchemy_version = os.environ.get("SQLALCHEMY_VERSION")
-    if sqlalchemy_version:
-        # Bypass nox-poetry use of --constraint so we can install a version of
-        # SQLAlchemy that doesn't match what's in poetry.lock.
-        session.poetry.session.install(  # type: ignore[attr-defined]
-            f"sqlalchemy=={sqlalchemy_version}",
-        )
-
     try:
         session.run(
             "coverage",