Finish and capture transaction/span bound to the Scope in case of a fatal crash #62
Description
For now the transaction gets lost in case of a fatal crash. We should finish it with an appropriate status before capturing the exception, if possible.
For more details getsentry/develop#443
### Tasks
- [ ] https://github.com/getsentry/sentry-java/issues/2316
- [ ] https://github.com/getsentry/sentry-cocoa/issues/2306
- [x] Dart
- [ ] React Native
- [ ] .NET