Husky 1.6.1

Changelog:
  - Updated dependencies and Gradle.
  - Fix: Fix NPE when opening links from quoted statuses
    (thanks mr64bit).
  - Fix: Mitra crash on provided null URL.
  - Fix: Not hide system toolbar icons.
  - Fix: Notifications with 'update' type.
  - Add: Post formats from instance endpoint.
  - Add: Media file size limits to upload per instance config.
  - Add: Cache instance settings to avoid multiple service calls.
