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Minor upgrade. This version contains preliminary changes for Java 11 support. Java 8 is still used as runtime environment but build process is compatible with Java 11. Production build process still uses Java 8.
Breaking changes
This version introduces sysconfig variable JAVA_HOME. This variable is used to control which Java installation is used as runtime environment. This variable is mandatory for smooth upgrade to version 4.0 which requires Java version 11 (earlier versions use Java 8).
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