Update go version to 1.21

Signed-off-by: Shobha M <mshobha@vmware.com>

go.mod

@@ -1,15 +1,15 @@
 module github.com/vmware/terraform-provider-tanzu-mission-control
 
-go 1.19
+go 1.21.0
 
 require (
-	github.com/go-openapi/strfmt v0.19.3
+	github.com/go-openapi/strfmt v0.19.5
 	github.com/go-openapi/swag v0.22.3
 	github.com/go-test/deep v1.0.3
 	github.com/hashicorp/go-cty v1.4.1-0.20200414143053-d3edf31b6320
 	github.com/hashicorp/terraform-plugin-sdk/v2 v2.16.0
 	github.com/pkg/errors v0.9.1
-	github.com/stretchr/testify v1.8.2
+	github.com/stretchr/testify v1.8.3
 	go.pinniped.dev v0.23.0
 	golang.org/x/exp v0.0.0-20221126150942-6ab00d035af9
 	k8s.io/apiextensions-apiserver v0.28.2
@@ -19,16 +19,17 @@ require (
 )
 
 require (
+	github.com/Microsoft/go-winio v0.5.2 // indirect
 	github.com/agext/levenshtein v1.2.2 // indirect
 	github.com/apparentlymart/go-cidr v1.1.0 // indirect
 	github.com/apparentlymart/go-textseg/v13 v13.0.0 // indirect
 	github.com/asaskevich/govalidator v0.0.0-20210307081110-f21760c49a8d
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/emicklei/go-restful/v3 v3.9.0 // indirect
 	github.com/evanphx/json-patch v5.6.0+incompatible // indirect
-	github.com/fatih/color v1.7.0 // indirect
+	github.com/fatih/color v1.13.0 // indirect
 	github.com/go-logr/logr v1.2.4 // indirect
-	github.com/go-openapi/errors v0.19.2 // indirect
+	github.com/go-openapi/errors v0.20.0 // indirect
 	github.com/go-openapi/jsonpointer v0.19.6 // indirect
 	github.com/go-openapi/jsonreference v0.20.2 // indirect
 	github.com/go-stack/stack v1.8.0 // indirect
@@ -38,7 +39,7 @@ require (
 	github.com/google/go-cmp v0.5.9 // indirect; indirec
 	github.com/google/gofuzz v1.2.0 // indirect
 	github.com/google/uuid v1.3.0 // indirect
-	github.com/hashicorp/errwrap v1.0.0 // indirect
+	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-checkpoint v0.5.0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
 	github.com/hashicorp/go-hclog v1.2.0 // indirect
@@ -61,8 +62,8 @@ require (
 	github.com/josharian/intern v1.0.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
-	github.com/mattn/go-colorable v0.1.4 // indirect
-	github.com/mattn/go-isatty v0.0.10 // indirect
+	github.com/mattn/go-colorable v0.1.11 // indirect
+	github.com/mattn/go-isatty v0.0.16 // indirect
 	github.com/mitchellh/copystructure v1.2.0 // indirect
 	github.com/mitchellh/go-testing-interface v1.14.1 // indirect
 	github.com/mitchellh/go-wordwrap v1.0.0 // indirect
@@ -75,9 +76,10 @@ require (
 	github.com/oklog/run v1.0.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/tidwall/pretty v1.2.0 // indirect
 	github.com/vmihailenco/msgpack v4.0.4+incompatible // indirect
 	github.com/vmihailenco/msgpack/v4 v4.3.12 // indirect
-	github.com/vmihailenco/tagparser v0.1.1 // indirect
+	github.com/vmihailenco/tagparser v0.1.2 // indirect
 	github.com/zclconf/go-cty v1.10.0 // indirect
 	go.mongodb.org/mongo-driver v1.5.1 // indirect
 	golang.org/x/crypto v0.17.0 // indirect