electron > 11.2.4 compatibility

[castroCrea]

Here I generate the mouse and this event only on mousedown and remove it on mouseup. The fact that mouseEvent where always listening cause the crash of the devTool on reloading electron.

[castroCrea]

fix #24

[kapetan]

Hi, is it possible to trim down the pull-request to absolute necessary changes? It's hard for me to see what the actual fix is.