Expose wave height property

[iDevelopper]

Hi,

Awesome, thanks for this library!

Can the height of the wave be exposed as a configuration property instead of using an arbitrary value (frame.height * 0.5)?

    func loadWaveformData(from audioURL: URL) {
        loadState.loading = true
        ASAudioWaveformDataFactory.loadAudioWaveformData(from: audioURL, formateSize: (waveformConfig.maxSamplesCount, frame.height * 0.5), timeRange: waveformConfig.timeRange) { (samples, assetData) in
            self.loadState = (true, false)
            self.filteredSamples = samples
            self.drawWaveform()
        }
    }