community/pure-maps: upgrade to 3.1.0
https://github.com/rinigus/pure-maps/releases/tag/3.1.0
- Redesign no-signal and low-signal icons [eLtMosen]
- Reduce basemap icons size [eLtMosen]
- Improve cmake build scripts
- Update translations
- [sfos] Distinguish between Chum and Jolla Store versions and warn users of limitations
- [sfos] SailJail permissions for Jolla Store version
- [ubuntu touch] Use MapLibre in Ubuntu packaging [jonnius]