bump terraform-plugin-sdk (#10)

Terraform-plugin-sdk was relying on internal API in grpc and was
blocking upgrade for security issues

go.mod

@@ -4,19 +4,12 @@ go 1.15
 
 require (
 	github.com/agext/levenshtein v1.2.3 // indirect
-	github.com/fatih/color v1.13.0 // indirect
 	github.com/fxamacker/cbor/v2 v2.4.0 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
-	github.com/hashicorp/terraform-plugin-sdk/v2 v2.17.0
-	github.com/hashicorp/terraform-registry-address v0.0.0-20220510144317-d78f4a47ae27 // indirect
+	github.com/hashicorp/terraform-plugin-sdk/v2 v2.29.0
 	github.com/hashicorp/yamux v0.0.0-20211028200310-0bc27b27de87 // indirect
-	github.com/imdario/mergo v0.3.13 // indirect
-	github.com/kr/pretty v0.3.0 // indirect
-	github.com/mattn/go-colorable v0.1.12 // indirect
 	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
 	github.com/oklog/run v1.1.0 // indirect
 	github.com/philandstuff/dhall-golang/v6 v6.0.2
-	github.com/vmihailenco/tagparser v0.1.2 // indirect
 	golang.org/x/net v0.17.0 // indirect
-	google.golang.org/grpc v1.53.0 // indirect
 )