0.6 - add telephone and timer skills

New

• [Telephone] Add telephone skill: search and call contacts #29 (thank you @MidnightNerd!)
• [Timer] Add timer skill: set, query and cancel timers (still not polished) #53
• View and grant the permissions a skill requires in skill settings #52
• Add a notice in skill settings when the user is using a language for which dicio-numbers is unavailable #58

Improved

• [Vosk] Update French and Spanish models #50 #56 (thank you @nshmyrev!)
• Improve small UI details in skill settings

Fixed

• Fix skills that continue the conversation: now the user is requested to answer only after the device has finished talking
• Fix crash when initializing Android TTS on some devices

Development

• Allow skills to require Android permissions #52 Stypox/dicio-skill#5
• dicio-numbers now also supports durations (though is still only available in English and Italian, help is wanted for translations)
• Add util_yes_no sentences file to be used across skills
• Introduce desugaring to allow using new Java features on old devices