debugpy release v1.0.0b4

Features: show disassembled Python bytecode when source is not available

Bug fixes: #52, #69, #72, #73, #83, #87, microsoft/ptvsd#2108

Preliminary support for Python 3.9

debugpy release v1.0.0b3

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

debugpy release v1.0.0b2

Major changes in API and CLI.

debugpy release v1.0.0b1

First release under the new name.