Usage
  $ repng <ReactComponent>

Options
  -d --out-dir    Directory to save file to
  -f --filename   Specify a custom output filename
  -w --width      Width of image
  -h --height     Height of image
  -p --props      Props in JSON format (or path to JSON file) to pass to the React component
  -t --type       Type of output (png default) (pdf, jpeg or png)
  --css           Path to CSS file to include
  --webfont       Path to custom webfont for rendering
  --puppeteer     Options for Puppeteer in JSON format