Execute on other hooks

[GerkinDev]

Hi,

I'm willing to execute commands on hook writeBundle instead of onGenerate. Would you be OK for a PR to accept an object with hooks to bind as key, and command string as parameter? Something like this:

export default {
    entry: 'src/app.js',
    dest: 'public/app.js',
    plugins: [
        // Open the browser when the bundle is generated
        execute({
            generateBundle: 'echo "Bundle generated"',
            writeBundle 'echo "Bundle written"',
    ]
}

What do you think about this?

[audinue]

That would be awesome. PR plase :)

[upisfree]

@GerkinDev thank you, necessary pull!