Fix #539 : Update sentry.gradle

[matthieupinte]

Fix provided by @icfr for issue #539

cf. #539 (comment)

[HazAT]

💯 🥇
Thanks :)

[ldco2016]

When I run a ./gradlew clean build, my terminal complains about this:

The TaskInternal.executer property has been deprecated and is scheduled to be removed in Gradle 5.0. There are better ways to re-use task logic, see https://docs.gradle.org/4.4/userguide/custom_tasks.html#sec:reusing_task_logic.
        at sentry_c79fxbhuascug468f001tukcq$_run_closure1$_closure6.doCall(/Users/danale/Projects/engage-application.mobile/node_modules/react-native-sentry/sentry.gradle:19)

I upgraded to the latest version you guys have, it seems gradle does not like this line:

def props = bundleTask.getProperties() is there a fix or workaround for this?