fix: Log out snapshot options in debug logs

[Robdel12]

Super helpful for debugging:

[percy] -> widths: 375,1200
[percy] -> minHeight: 1024
[percy] -> enableJavaScript: undefined
[percy] -> requestHeaders: undefined
[percy] -> percyCSS: .percy-only-css-global {
  height: 300px;
  width: 300px;
  background-color: blue;
}```

[wwilsman]

Or rather than stringify or inspect, we could follow the same pattern from above and break the options apart.

snapshotLogger.debug(`-> widths: ${snapshotOptions.widths}`)
snapshotLogger.debug(`-> minHeight: ${snapshotOptions.minHeight}`)
snapshotLogger.debug(`-> enableJavaScript: ${snapshotOptions.enableJavaScript}`)
snapshotLogger.debug(`-> requestHeaders: ${snapshotOptions.requestHeaders}`)
snapshotLogger.debug(`-> percyCSS: ${snapshotOptions.percyCSS}`)

I'm okay with either way, just throwing out options

[wwilsman]

🎮