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.