should accept inline Object Literals as Task Groups

[shakyShane]

if an object literal with a tasks property is given within a parent tasks array, like

cb.task('build', [
    '@sh rm -rf dist',
    '@npm webpack --config webpack-prod.js',
    {
        tasks: ['rsync', 'open']
    }
]);

this is exactly equivalent to the following:

cb.task('build', [
    '@sh rm -rf dist',
    '@npm webpack --config webpack-prod.js',
    'rsync', 
    'open'
]);

but, by providing an Object literal for the last two tasks, you could use additional features, like running in parallel, environment vars, only running following file changes etc etc

eg:

cb.task('build', [
    '@sh rm -rf dist',
    '@npm webpack --config webpack-prod.js',
    {
        tasks: ['rsync', 'open'],
        ifChanged: ['path/to/src'],
        runMode: 'parallel',
        env: {
            REMOTE: 'http://example.com'
        }
    }
]);