[wip] test with dev

Author: ales-erjavec

tox.ini

@@ -36,8 +36,8 @@ deps =
     latest: https://github.com/biolab/orange-canvas-core/archive/refs/heads/master.zip#egg=orange-canvas-core
     latest: https://github.com/biolab/orange-widget-base/archive/refs/heads/master.zip#egg=orange-widget-base
     # GUI requirements
-    oldest: orange-canvas-core==0.1.30
-    oldest: orange-widget-base==4.22.0
+    oldest: orange-canvas-core==0.2.0a1
+    oldest: orange-widget-base==4.23.0rc1
     oldest: AnyQt==0.2.0
     oldest: matplotlib==3.2.0
     oldest: pygments==2.8.0