feat: add support for Kubernetes 1.13.12 (#2160)

See https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.13.md#changelog-since-v11311

pkg/api/common/versions.go

@@ -116,8 +116,9 @@ var AllKubernetesSupportedVersions = map[string]bool{
 	"1.13.7":         false,
 	"1.13.8":         false,
 	"1.13.9":         false,
-	"1.13.10":        true,
+	"1.13.10":        false,
 	"1.13.11":        true,
+	"1.13.12":        true,
 	"1.14.0-alpha.1": false,
 	"1.14.0-alpha.2": false,
 	"1.14.0-beta.1":  false,