Add method for Indonesian

[andes2912]

Assalamualaikum, sir cana you add CalculationMethod for Indonesian ?
for now time is't accurate

[ench0]

Alaikum salam, can you point me to the official resources/rules to that are used for Indonesian method? For example angle, offsets etc. Please have a look at the other methods to get an idea what is needed:

https://github.com/prayer-timetable/adhan_dart/blob/master/lib/src/CalculationMethod.dart

[andes2912]

like this :
Fajr: 20.0°-Isha'a: 18.0° ?