Was looking at my sentry config and noticed a couple of issues

• I'd like to add a whitelistUrls array to my config, but the options of this array are merged on every build. So after 3 builds my urls are all listed three times (in sentry.server.config.js)
• Whitelist urls in Sentry should allow for regexp, but these arent correctly stringified atm. I tihnk we could check for value instanceof RegExp and then just call value.toString()?
• Functions arent correctly stringified. Id like to try using sentry's user feedback feature but then you need to pass a beforeSend fn to your options. Nuxt should already provide a serializeFunction helper in the template context, maybe we could use that or did you use String for functions on purpose?