v1.20.0

• Added possibility to target "negation" and "combinators" for groups
• Added possibility to target "field", "operator" and "value" for rule
• Protected mode for "combinators", "field", "operator", "value" in monaco text mode
• Validation of permissibility of "negation" in text mode
• Adapted GUI lock / unlock to account for granular readOnly targets
• Updated documentation and api sections on the website
• Updated README
• Fixed protected ranges in the monaco text editor (previously, protected ranges could get reapplied to a wrong nodes after edit)
• Added readOnlyProtectsDelete property that controls, whether group with protected nodes can be deleted or not