Fix #975: Properties parameter to the configure API has become required in 1.6.1

Author: Pavel Minaev

src/debugpy/server/api.py

@@ -74,7 +74,7 @@ def log_to(path):
         log.log_dir = path
 
 
-def configure(properties, **kwargs):
+def configure(properties=None, **kwargs):
     if _settrace.called:
         raise RuntimeError("debug adapter is already running")
 

tests/debugpy/test_attach.py

@@ -22,6 +22,11 @@ def code_to_debug():
         import time
         from debuggee import backchannel, scratchpad
 
+        # Test different ways of calling configure(). 
+        debugpy.configure(qt="none", subProcess=True, python=sys.executable)
+        debugpy.configure({"qt": "none", "subProcess": True, "python": sys.executable})
+        debugpy.configure({"qt": "none"}, python=sys.executable)
+
         debuggee.setup()
         _, host, port, wait_for_client, is_client_connected, stop_method = sys.argv
         port = int(port)