Revert "use sqlalchemy 1.3.x for mautrix-telegram"

pkgs/development/python-modules/sqlalchemy/default.nix

@@ -0,0 +1,52 @@
+{ stdenv
+, lib
+, fetchPypi
+, buildPythonPackage
+, isPy3k
+, pythonOlder
+, greenlet
+, importlib-metadata
+, mock
+, pysqlite ? null
+, pytestCheckHook
+, pytest_xdist
+}:
+
+buildPythonPackage rec {
+  pname = "SQLAlchemy";
+  version = "1.4.16";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "15yl9frbxsq90hq5b8znqy34fg5kqdw1jjw933kz709rbpxw4lzd";
+  };
+
+  propagatedBuildInputs = [
+    greenlet
+  ] ++ lib.optionals (pythonOlder "3.8") [
+    importlib-metadata
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+    mock
+  ] ++ lib.optional (!isPy3k) pysqlite;
+
+  postInstall = ''
+    sed -e 's:--max-worker-restart=5::g' -i setup.cfg
+  '';
+
+  dontUseSetuptoolsCheck = true;
+
+  # disable mem-usage tests on mac, has trouble serializing pickle files
+  disabledTests = lib.optionals stdenv.isDarwin [
+    "MemUsageWBackendTest"
+    "MemUsageTest"
+  ];
+
+  meta = with lib; {
+    homepage = "http://www.sqlalchemy.org/";
+    description = "A Python SQL toolkit and Object Relational Mapper";
+    license = licenses.mit;
+  };
+}