[electron] Upgrade electron to version 3.x.x

[thegecko]

In order to take advantage of updates and security fixes in electron, we should upgrade to the latest version of 3.x.x (currently 3.0.10).

This would target the following sub-product versions:

• Node > 10.2.0
• Chrome > 66
• V8 > 6.6

We should also update the minimum node version used by Theia to match the above (>=10.2.0).

According to node.green this update would then allow support of all ES2015 language features.

Note: This should be done inline with VS Code's support for electron.

[thegecko]

VS Code are planning on moving to electron 3.x in Q1 2019:

microsoft/vscode#52629 (comment)

[thegecko]

Upgrading to node 10 would also fix #2009

[thegecko]

This now works on the electron-3 branch.

Tests are yet to pass, however.

[debovema]

Hi

This would also fix electron/electron#15194 which was merged in Electron but backported only to 3.x and 4.x versions.

I created #4736 to use the latest 3.x version of Electron.

@thegecko : do you have an ETA for this issue ?

[thegecko]

@debovema what timescales are you working to? I'm happy to update the branch to get it working again and open a PR for discussion with the rest of the team.

My issue was getting the tests passing, would you be able to help with that?

[debovema]

I am mainly targeting a browser app but having an Electron app would be good on the long-term.

I will try to run the tests and see what's wrong.

[thegecko]

Fixed