Add envtest

I know it's not an impressive test. It just brings up a node, and
makes sure it registers. Let's do more in the future.

Signed-off-by: Sargun Dhillon <sargun@sargun.me>

go.mod

@@ -5,13 +5,12 @@ go 1.13
 require (
 	contrib.go.opencensus.io/exporter/jaeger v0.1.0
 	contrib.go.opencensus.io/exporter/ocagent v0.4.12
+	github.com/bombsimon/logrusr v1.0.0
 	github.com/docker/spdystream v0.0.0-20170912183627-bc6354cbbc29 // indirect
 	github.com/elazarl/goproxy v0.0.0-20190421051319-9d40249d3c2f // indirect
 	github.com/elazarl/goproxy/ext v0.0.0-20190711103511-473e67f1d7d2 // indirect
-	github.com/golang/groupcache v0.0.0-20181024230925-c65c006176ff // indirect
-	github.com/google/go-cmp v0.3.1
+	github.com/google/go-cmp v0.4.0
 	github.com/gorilla/mux v1.7.0
-	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/pkg/errors v0.8.1
 	github.com/prometheus/client_golang v1.0.0
@@ -20,13 +19,15 @@ require (
 	github.com/spf13/pflag v1.0.5
 	go.opencensus.io v0.21.0
 	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e
-	golang.org/x/sys v0.0.0-20191022100944-742c48ecaeb7
+	golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd
 	gotest.tools v2.2.0+incompatible
-	k8s.io/api v0.18.4
-	k8s.io/apimachinery v0.18.4
-	k8s.io/client-go v0.18.4
+	k8s.io/api v0.18.6
+	k8s.io/apimachinery v0.18.6
+	k8s.io/client-go v0.18.6
 	k8s.io/klog v1.0.0
+	k8s.io/klog/v2 v2.0.0
 	k8s.io/kubernetes v1.18.4
+	sigs.k8s.io/controller-runtime v0.6.3
 )
 
 replace k8s.io/legacy-cloud-providers => k8s.io/legacy-cloud-providers v0.18.4