Add support for array of inputs

[SamVerschueren]

It would be nice if you could retrieve multiple icons at the same time.

fileIcon(['Safari', 'Chrome']).then(buffers => {
    fs.writeFileSync('safari-icon.png', buffer[0]);
    fs.writeFileSync('chrome-icon.png', buffer[1]);
});

The Swift part of the code should handle getting multiple icons and then send back an array of buffers to the JS side.

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Submitted pull Requests

• #9 Feature: Add support for array of inputs

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[benkoska]

I can fix this if it's still needed

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