Add support to unmarshal json in cli option struct

Signed-off-by: abdullah1308 <[email protected]>

go.mod

@@ -3,26 +3,28 @@ module github.com/layer5io/nighthawk-go
 go 1.19
 
 require (
-	fortio.org/fortio v1.6.8
-	github.com/envoyproxy/go-control-plane v0.10.2-0.20220325020618-49ff273808a1
-	github.com/envoyproxy/protoc-gen-validate v0.6.2
+	fortio.org/fortio v1.40.1
+	github.com/envoyproxy/go-control-plane v0.11.1
+	github.com/envoyproxy/protoc-gen-validate v1.0.2
 	github.com/layer5io/meshkit v0.5.32
 	github.com/pkg/errors v0.9.1
-	github.com/sirupsen/logrus v1.8.1
-	google.golang.org/genproto v0.0.0-20220502173005-c8bf987b8c21
-	google.golang.org/grpc v1.46.0
-	google.golang.org/protobuf v1.28.0
+	github.com/sirupsen/logrus v1.9.3
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230526203410-71b5a4ffd15e
+	google.golang.org/grpc v1.55.0
+	google.golang.org/protobuf v1.31.0
 )
 
 require (
 	cuelang.org/go v0.4.3 // indirect
-	github.com/cncf/xds/go v0.0.0-20211011173535-cb28da3451f1 // indirect
+	fortio.org/assert v1.2.0 // indirect
+	github.com/cncf/xds/go v0.0.0-20230607035331-e9ce68804cb4 // indirect
 	github.com/cockroachdb/apd/v2 v2.0.1 // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/uuid v1.3.0 // indirect
 	github.com/mpvl/unique v0.0.0-20150818121801-cbe035fff7de // indirect
-	golang.org/x/net v0.0.0-20220412020605-290c469a71a5 // indirect
-	golang.org/x/sys v0.0.0-20220412211240-33da011f77ad // indirect
-	golang.org/x/text v0.3.7 // indirect
-	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+	golang.org/x/exp v0.0.0-20230425010034-47ecfdc1ba53 // indirect
+	golang.org/x/net v0.12.0 // indirect
+	golang.org/x/sys v0.10.0 // indirect
+	golang.org/x/text v0.11.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )