message: fix(replay): Don't mangle private rrweb property
  Add rrweb's `_cssText` property to the list of reserved properties to be excluded from mangling.
diff: @@ -119,6 +119,8 @@ export function makeTerserPlugin() {
  // We want to keept he _replay and _isEnabled variable unmangled to enable integration tests to access it
  '_replay',
  '_isEnabled',
  + // We also can't mangle rrweb private fields when bundling rrweb in the replay CDN bundles
  + '_cssText',
  // We want to keep the _integrations variable unmangled to send all installed integrations from replay
  '_integrations',
  ],
  