Update native encoding detection for JEP400#1393

Merged

matthiasblaesing merged 3 commits intojava-native-access:masterfrom matthiasblaesing:native_encoding_jdk18

Nov 3, 2021

+138-84

Commits on Oct 29, 2021

Check if system property native.encoding is set and use that to determine default charset
matthiasblaesing
committed
Update java version for CI
matthiasblaesing
committed
Make javac source and target level for contrib jars configurable
matthiasblaesing
committed