feat(react): Make Profiler _mountSpan attribute protected (#3904)
feat(react): Make Profiler _mountSpan attribute protected (#3904)

Done for React Native SDK.

Co-authored-by: Abhijeet Prasad <821898cd6fe765bf0448917da35ef5bda53eb73e@sentry.io>
getsentry/raven-js,getsentry/raven-js,getsentry/raven-js,getsentry/raven-js