Bump versionName to 1.0.9

Also bump gradle to 3.4.0-rc02

Update to latest versions of dependencies

- Crashlytics
- Firebase
- Gradle
- Kotlin

Test: CI and manual tests

Only cancel the children of the ShotsRepository.

ShotsRepository is a singleton that lives in the scope of the app. Once cancelAllSearches was called, no other calls could have been triggered, because the parent job was canceled (once a job was cancelled it cannot be active again. See https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/-job/index.html ).
So for now, we're just cancelling the children.

Future, ideal fix - remove the job launching from the Repository

Move the loading displaying in Login, on the UI thread

Fixed some animations.

Oh so many bug fixes and tantelizing enhancements.

Release 0.9.9 (Build 390)

Merge pull request nickbutcher#35 from nickbutcher/dn_story

Improved Designer News experience.

Reduce elevation when dismissing search.

Fixed incorrect use of stable ids & improved return transition.

Change-Id: I152416077ac45c0a422ab756934cac799b920e52