Update git submodules
- Update MinervaNeue from branch 'master' to 18a9a067ebdfd5ff944d566b78e5ffd1496e0fb1
- Localisation updates from https://translatewiki.net.
Change-Id: I17144ee5a3c243fdbc62e6c7fb66b415b9751a21
- Localisation updates from https://translatewiki.net.