Update default jTwig engine to 5.86.1 (#67)
Update default jTwig engine to 5.86.1 (#67)

As this one at least contains the ever critical `parent()` function, where the previous version used here (5.56.*) didn't
perwendel/spark-template-engines,arekkw/spark-template-engines,arekkw/spark-template-engines,perwendel/spark-template-engines