v3.7.0

• Dropped support for Python 3.9 (EOL).
• Fixed regression introduced with v3.6.0 whereby ufoLib2 was imported
  unconditionally in ufo2ft.instantiator while not being declared as
  a required dependency in pyproject.toml. We now restored compatibility
  with defcon, and neither defcon nor ufoLib2 is strictly required given
  that ufo2ft API is designed to be agnostic and work with either (#956).