v0.2.0-nullsafety.3

Removed indonesia id to in mapping

v0.2.0-nullsafety.2

Fixes null safety issue. Adds steps on how to build the code generator jar to the README.

v0.2.0-nullsafety.1

Fixes some null safety issues (unnecessary casts, null checks, etc.)

v0.2.0-nullsafety.0

as2f generator generating null-safe localization code.