update dependencies (#6267)

Signed-off-by: hongming <coder.scala@gmail.com>

vendor/github.com/open-policy-agent/opa/ir/ir.go

@@ -364,6 +364,13 @@ type IsObjectStmt struct {
 	Location
 }
 
+// IsSetStmt represents a dynamic type check on a local variable.
+type IsSetStmt struct {
+	Source Operand `json:"source"`
+
+	Location
+}
+
 // IsDefinedStmt represents a check of whether a local variable is defined.
 type IsDefinedStmt struct {
 	Source Local `json:"source"`

vendor/github.com/open-policy-agent/opa/ir/pretty.go

@@ -25,11 +25,11 @@ type prettyPrinter struct {
 	w     io.Writer
 }
 
-func (pp *prettyPrinter) Before(x interface{}) {
+func (pp *prettyPrinter) Before(_ interface{}) {
 	pp.depth++
 }
 
-func (pp *prettyPrinter) After(x interface{}) {
+func (pp *prettyPrinter) After(_ interface{}) {
 	pp.depth--
 }