v13.0.0 (bug fix, update)

fix functions with no type field can't be filtered out in array parse;
fix empty Function inputs/outputs always report FLAGS_NONE if created from JSON in which the inputs/outputs field is not present;
new Contract ABI (JSON) parsing API with significant performance optimizations (see ABIParser.java);
add static methods for parsing InputStream to Function, Event, and ContractError;
add ABIJSON.optimize(String);
change exception type;
add ABIJSON.NORMAL_FUNCTIONS;
add param to parseElements;
use gson v2.12.0, parse json strictly;
improve gson version resolution;
make Tuple closed for extension;
disallow user-defined subclasses of RLPItem;
throw on abnormal Notation parse return;
reduce max type length;
reduce max function name length;
don't print anything to System.err;
FLAG_LEGACY_DECODE is no longer experimental;

SHA-256 (headlong-13.0.0.jar): 5ec5ab76ffc1532eff553f74b41c7f1214940c454594120ddd6306203ad028f5

Full Changelog: v12.3.3...v13.0.0