updating terraform-plugin-go to v0.9.1 (#9)

Author: dcarbone

go.mod

@@ -4,7 +4,7 @@ go 1.17
 
 require (
 	github.com/hashicorp/terraform-plugin-framework v0.8.0
-	github.com/hashicorp/terraform-plugin-go v0.9.0
+	github.com/hashicorp/terraform-plugin-go v0.9.1
 )
 
 require (
@@ -16,11 +16,10 @@ require (
 	github.com/mattn/go-colorable v0.1.4 // indirect
 	github.com/mattn/go-isatty v0.0.10 // indirect
 	github.com/mitchellh/go-testing-interface v1.14.1 // indirect
-	github.com/stretchr/testify v1.7.0 // indirect
 	github.com/vmihailenco/msgpack/v4 v4.3.12 // indirect
 	github.com/vmihailenco/tagparser v0.1.1 // indirect
 	golang.org/x/net v0.0.0-20210119194325-5f4716e94777 // indirect
-	golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 // indirect
+	golang.org/x/sys v0.0.0-20210119212857-b64e53b001e4 // indirect
 	google.golang.org/appengine v1.6.5 // indirect
 	google.golang.org/protobuf v1.28.0 // indirect
 )