Upgrade project to Electron 4

[clone1612]

Description

On Arch Linux the Electron package has already been upgraded to v4.x with which this package is not yet compatible. This is due to one particular breaking change which has been fixed with this PR.

Issue fixed

Electron 4 compatibility & upgrade. All tests pass without any issues and my manual tests have shown no broken functionality.

Type of changes

• 🔘 Bug fix (Change that fixed an issue)
• ⚪ Breaking change (Change that can cause existing functionality to change)
• 🔘 Improvement (Change that improves the code. Maybe performance or development improvement)
• ⚪ Feature (Change that adds new functionality)
• ⚪ Documentation change (Change that modifies documentation. Maybe typo fixes)

Checklist:

• 🔘 My code follows the project code style
• ⚪ I have written test for my code and it has been tested
• 🔘 All existing tests have been passed
• ⚪ I have attached a screenshot/video to visualize my change if possible

[Rokt33r]

I'm going to try this after I release v0.11.15.