General information:

• The next release of bpython (0.21) will drop support for Python 2.
• Support for Python 3.9 has been added. Support for Python 3.5 has been
  dropped.

New features:

• #802: Provide redo.
  Thanks to Evan.
• #835: Add support for importing namespace packages.
  Thanks to Thomas Babej.

Fixes:

• #622: Provide encoding attribute for FakeOutput.
• #806: Prevent symbolic link loops in import completion.
  Thanks to Etienne Richart.
• #807: Support packages using importlib.metadata API.
  Thanks to uriariel.
• #809: Fix support for Python 3.9's ast module.
• #817: Fix cursor position with full-width characters.
  Thanks to Jack Rybarczyk.
• #853: Fix invalid escape sequences.