Bump compat for HerbGrammar to 0.6

Author: CompatHelper Julia

Project.toml

@@ -29,7 +29,7 @@ FileIO = "1"
 Graphs = "1.12"
 HerbConstraints = "0.4"
 HerbCore = "0.3.4"
-HerbGrammar = "0.5"
+HerbGrammar = "0.6"
 HerbSearch = "0.4.1"
 MLStyle = "0.4.17"
 MetaGraphsNext = "0.7"