chore: upgrade coredns version (#550)

vendor/github.com/expr-lang/expr/builtin/function.go

@@ -0,0 +1,23 @@
+package builtin
+
+import (
+	"reflect"
+)
+
+type Function struct {
+	Name      string
+	Fast      func(arg any) any
+	Func      func(args ...any) (any, error)
+	Safe      func(args ...any) (any, uint, error)
+	Types     []reflect.Type
+	Validate  func(args []reflect.Type) (reflect.Type, error)
+	Deref     func(i int, arg reflect.Type) bool
+	Predicate bool
+}
+
+func (f *Function) Type() reflect.Type {
+	if len(f.Types) > 0 {
+		return f.Types[0]
+	}
+	return reflect.TypeOf(f.Func)
+}