Edge support

[Sanyusha]

Hi,
Does wct support Edge browser? When I try to configure:

plugins: {
        local: {
            browsers:       ['chrome', 'edge'],
            browserOptions: {
                chrome: [
                    'headless',
                    'disable-gpu'
                ]
            }
        }
    }

I'm getting:
"Error: The following browsers are unsupported: edge. (All supported browsers: aurora, canary, chrome, firefox, ie)"

[stale]

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