Add terraform 0.12 support (#21)

Add terraform 0.12 support

go.mod

@@ -1,28 +1,17 @@
 module github.com/sapcc/terraform-provider-ccloud
 
+go 1.12
+
 require (
-	github.com/apparentlymart/go-cidr v1.0.0 // indirect
-	github.com/blang/semver v3.5.1+incompatible // indirect
-	github.com/go-openapi/runtime v0.18.0
-	github.com/go-openapi/strfmt v0.18.0
-	github.com/gophercloud/gophercloud v0.0.0-20190307220656-fe1ba5ce12dd
-	github.com/gophercloud/utils v0.0.0-20190307223825-8644e0e18464
-	github.com/hashicorp/go-getter v1.2.0 // indirect
-	github.com/hashicorp/go-hclog v0.8.0 // indirect
-	github.com/hashicorp/go-plugin v0.0.0-20190220160451-3f118e8ee104 // indirect
-	github.com/hashicorp/hcl v1.0.0 // indirect
-	github.com/hashicorp/hcl2 v0.0.0-20190305174554-fdf8e232b64f // indirect
-	github.com/hashicorp/hil v0.0.0-20190212132231-97b3a9cdfa93 // indirect
-	github.com/hashicorp/logutils v1.0.0 // indirect
-	github.com/hashicorp/terraform v0.11.13
+	github.com/go-openapi/runtime v0.19.0
+	github.com/go-openapi/strfmt v0.19.0
+	github.com/gophercloud/gophercloud v0.1.1-0.20190611014943-368f26bad44c
+	github.com/gophercloud/utils v0.0.0-20190527093828-25f1b77b8c03
+	github.com/hashicorp/terraform v0.12.1
 	github.com/kayrus/gophercloud-arc v0.0.0-20190312091753-2e63bfbb62aa
 	github.com/kayrus/gophercloud-lyra v0.0.0-20190312091744-e39ec87bb953
-	github.com/mitchellh/cli v1.0.0 // indirect
-	github.com/mitchellh/copystructure v1.0.0 // indirect
-	github.com/mitchellh/hashstructure v1.0.0 // indirect
 	github.com/pkg/errors v0.8.1
-	github.com/sapcc/gophercloud-limes v0.0.0-20190305085625-07ecaa77e653
-	github.com/sapcc/kubernikus v0.0.0-20190315142052-6f464117b368
-	github.com/sapcc/limes v0.0.0-20190306133048-88a66de094d2
-	github.com/zclconf/go-cty v0.0.0-20190212192503-19dda139b164 // indirect
+	github.com/sapcc/gophercloud-limes v0.0.0-20190319123021-2ed8e1224541
+	github.com/sapcc/kubernikus v0.0.0-20190607150640-1c55acfb983a
+	github.com/sapcc/limes v0.0.0-20190528142429-b76498a6f77f
 )