1.0.0

Released: July 13, 2018

• [feature] [general] For Alembic 1.0, Python 2.6 / 3.3 support is being dropped, allowing a
  fixed setup.py to be built as well as universal wheels. Pull request
  courtesy Hugo.

  References: #491

• [feature] [general] With the 1.0 release, Alembic's minimum SQLAlchemy support version
  moves to 0.9.0, previously 0.7.9.

• [batch] [bug] Fixed issue in batch where dropping a primary key column, then adding it
  back under the same name but without the primary_key flag, would not remove
  it from the existing PrimaryKeyConstraint. If a new PrimaryKeyConstraint
  is added, it is used as-is, as was the case before.

  References: #502