测试Django模式和数据迁移，包括迁移顺序

Breaking Changes

• Rename following Migrator methods (#83):

  • before to apply_initial_migration
  • after to apply_tested_migration

• Improves databases setup and teardown for migrations tests (#76)
  Currently Migrator.reset uses migrate management command and all logic
  related to migrations tests setup is moved to
  Migrator.apply_tested_migration.

Bugfixes

• Fixes pre_migrate and post_migrate signals muting (#87)
• Adds missing typing_extension dependency (#86)

Misc

• Refactor tests (#79)
• Return django installed from master branch to testing matrix (#77)

Features

• Drops django@2.1 support
• Adds '*' alias for ignoring
  all migrations in an app with DTM_IGNORED_MIGRATIONS

Bugfixes

• Fixes how pre_migrate and post_migrate signals are muted

Misc

• Updates wemake-python-styleguide
• Moves from travis to Github Actions

Features

• Adds autoname check to forbid *_auto_* named migrations
• Adds django@3.0 support
• Adds python3.8 support

Bugfixes

• Fixes that migtaions were failing with pre_migrate and post_migrate signals
• Fixes that tests were failing when pytest --nomigration was executed,
  now they are skipped

Misc

• Updates to poetry@1.0

Version 0.1.0

• Initial release