label cannot be provided as a keyword

[ElMassimo]

The readme mentions:

If you are calling it in a loop, or with different variations, you can include a label on the filename:

flamegraph(label: "rspec") {
  # your code here
}

This is not accurate, as it results in:

     ArgumentError:
       unknown keyword: :label

If the library wants to support both a normal parameter and a keyword arg, it could use:

def flamegraph(_label = nil, label: _label, open: true, ignore_gc: false, interval: 1000, &block)

[technicalpickles]

Thanks for reporting! I'm not sure which I really intended 🤔

I think I'm alright with keeping it a positional argument, and updating the docs.

[technicalpickles]

Fixed the docs, and added some tests around this. Included in 0.2.0