Debugpy

Bug fixes: 86, 106

Features: 134, 136, 146, microsoft/ptvsd118, microsoft/ptvsd763, microsoft/ptvsd1621

Bug fixes: 113, 116

Bug fixes: 99, 108

Bug fixes: 84, 90, 92, https://github.com/microsoft/ptvsd/issues/998

Features: show disassembled Python bytecode when source is not available

Bug fixes: 52, 69, 72, 73, 83, 87, https://github.com/microsoft/ptvsd/issues/2108

Preliminary support for Python 3.9

Support for reverse connection direction (adapter -> client).