fixed pyqtSignal

ToDo.md

@@ -51,6 +51,13 @@ line.
 2. https://git.plastiras.org/emdee/toxygen_wrapper needs packaging
    and making a dependency.
 
+## Migration
+
+Migrate PyQt5 to qtpy - almost done.
+
+Maybe migrate gevent to asyncio, or look at https://pypi.org/project/asyncio-gevent/
+
+
 ## Standards
 
 There's a standard for Tox clients that this has not been tested against: