Working fastlane for ios

react-native-sentry needed to pin sentry-cli to old version
because of this change: https://github.com/getsentry/sentry-cli/pull/200

env-example

@@ -2,4 +2,5 @@ EVENT_API_URL=https://studentersamfundet.no
 DUSKEN_API_URL=https://galtinn.neuf.no
 DUSKEN_FORGOT_PASSWORD_URL=https://galtinn.neuf.no/auth/password_reset/
 SENTRY_DSN=
-STRIPE_PUBLISHABLE_KEY=
+STRIPE_PUBLISHABLE_KEY=
+SLACK_URL=