fixes issues/8; upgrade

example/go.mod

@@ -1,6 +1,6 @@
 module main
 
-go 1.15
+go 1.17
 
 require (
 	github.com/gorilla/mux v1.8.0 // indirect

go.mod

@@ -1,5 +1,53 @@
 module github.com/salrashid123/terraform-provider-http-full
 
-require github.com/hashicorp/terraform-plugin-sdk/v2 v2.7.0
+require github.com/hashicorp/terraform-plugin-sdk/v2 v2.20.0
 
-go 1.13
+require (
+	github.com/agext/levenshtein v1.2.2 // indirect
+	github.com/apparentlymart/go-textseg/v13 v13.0.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/fatih/color v1.13.0 // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/go-cmp v0.5.8 // indirect
+	github.com/hashicorp/errwrap v1.0.0 // indirect
+	github.com/hashicorp/go-checkpoint v0.5.0 // indirect
+	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
+	github.com/hashicorp/go-cty v1.4.1-0.20200414143053-d3edf31b6320 // indirect
+	github.com/hashicorp/go-hclog v1.2.1 // indirect
+	github.com/hashicorp/go-multierror v1.1.1 // indirect
+	github.com/hashicorp/go-plugin v1.4.4 // indirect
+	github.com/hashicorp/go-uuid v1.0.3 // indirect
+	github.com/hashicorp/go-version v1.6.0 // indirect
+	github.com/hashicorp/hc-install v0.4.0 // indirect
+	github.com/hashicorp/hcl/v2 v2.13.0 // indirect
+	github.com/hashicorp/logutils v1.0.0 // indirect
+	github.com/hashicorp/terraform-exec v0.17.2 // indirect
+	github.com/hashicorp/terraform-json v0.14.0 // indirect
+	github.com/hashicorp/terraform-plugin-go v0.12.0 // indirect
+	github.com/hashicorp/terraform-plugin-log v0.7.0 // indirect
+	github.com/hashicorp/terraform-registry-address v0.0.0-20220623143253-7d51757b572c // indirect
+	github.com/hashicorp/terraform-svchost v0.0.0-20200729002733-f050f53b9734 // indirect
+	github.com/hashicorp/yamux v0.0.0-20181012175058-2f1d1f20f75d // indirect
+	github.com/mattn/go-colorable v0.1.12 // indirect
+	github.com/mattn/go-isatty v0.0.14 // 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
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/mitchellh/reflectwalk v1.0.2 // indirect
+	github.com/oklog/run v1.0.0 // 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/zclconf/go-cty v1.10.0 // indirect
+	golang.org/x/crypto v0.0.0-20220517005047-85d78b3ac167 // indirect
+	golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2 // indirect
+	golang.org/x/sys v0.0.0-20220503163025-988cb79eb6c6 // indirect
+	golang.org/x/text v0.3.7 // indirect
+	google.golang.org/appengine v1.6.6 // indirect
+	google.golang.org/genproto v0.0.0-20200711021454-869866162049 // indirect
+	google.golang.org/grpc v1.48.0 // indirect
+	google.golang.org/protobuf v1.28.0 // indirect
+)
+
+go 1.17