grammar.sexp.yml in predicate-2.7.0

- old
+ new

@@ -82,9 +82,11 @@
     - "::Object"
   placeholder:
     - "::Predicate::Placeholder"
   opaque:
     - "::Object"
+  handler:
+    - "::Object"
   options:
     - "::Hash"
   name:
     !ruby/regexp /^[a-zA-Z0-9_]+[?!]?$/
   semantics: