v1.2.0 - Removed LOG4J, replaced DoubleFunction with DoubleUnaryOperator
CHANGE LOG (26.05.2024):
- backward compatibility: NOT COMPATIBLE (changed function type)
- replaced LOG4J logging to default java.util.Logger for simplicity
- changed DoubleFunction with DoubleUnaryOperator as the boxed types are not needed in solver processing
- minor refactoring