[nomerge] test with dev

Author: ales-erjavec

tox.ini

@@ -27,6 +27,8 @@ deps =
     pyqt5==5.12.*
     pyqtwebengine==5.12.*
     -r {toxinidir}/requirements-opt.txt
+    git+https://github.com/ales-erjavec/orange-widget-base.git@explicit-close-signal
+    git+https://github.com/biolab/orange-canvas-core.git
 commands_pre =
     # Verify installed packages have compatible dependencies
     pip check