astro/stellarium: update the port to version 1.0 (+)

The Stellarium team did it: Stellarium 1.0 is here!

• After more than 20 years of development, the program is finally accurate enough for historical application
• A new, much better skylight model
• Many details around eclipses
• Updated Observation List features
• New features in AstroCalc tool
• HiDPI improvements
• Better dithering
• New skyculture: Samoan
• Updated several skycultures
• Updates in Angle Measure, Satellites, Oculars, Remote Control, Pulsars plugins

Reported by: portscout et al.