Update vpphelper version.

Signed-off-by: Ed Warnicke <hagbard@gmail.com>

go.mod

@@ -11,7 +11,7 @@ require (
 	github.com/edwarnicke/grpcfd v0.0.0-20201107002751-f220aed0c5c8
 	github.com/edwarnicke/log v1.0.0
 	github.com/edwarnicke/signalctx v0.0.0-20201105214533-3a35840b3011
-	github.com/edwarnicke/vpphelper v0.0.0-20201125015206-ce96ab6dfb2e
+	github.com/edwarnicke/vpphelper v0.0.0-20201229173204-87a3b197f1e1
 	github.com/golang/protobuf v1.4.3
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/networkservicemesh/api v0.0.0-20210112152104-45029fb10e27

go.sum

@@ -88,8 +88,8 @@ github.com/edwarnicke/serialize v1.0.7 h1:geX8vmyu8Ij2S5fFIXjy9gBDkKxXnrMIzMoDvV
 github.com/edwarnicke/serialize v1.0.7/go.mod h1:y79KgU2P7ALH/4j37uTSIdNavHFNttqN7pzO6Y8B2aw=
 github.com/edwarnicke/signalctx v0.0.0-20201105214533-3a35840b3011 h1:rlA4xj11pzxP9w/qVP11qZkRN+7UfA8MiW6pPljW0CM=
 github.com/edwarnicke/signalctx v0.0.0-20201105214533-3a35840b3011/go.mod h1:Z9/3G9n/oPyXJzsF4ucVh8YOxTlTidDLqOeWlGV1JAw=
-github.com/edwarnicke/vpphelper v0.0.0-20201125015206-ce96ab6dfb2e h1:NEcbmS+Oo8ZRr/DdU0xQ/szhAYgPBYaJYQ2w+hGWlm0=
-github.com/edwarnicke/vpphelper v0.0.0-20201125015206-ce96ab6dfb2e/go.mod h1:Vs6aWFIO9nTFhl0qsxEprx0iab0l5Swb5f6srxG2rLI=
+github.com/edwarnicke/vpphelper v0.0.0-20201229173204-87a3b197f1e1 h1:gX3ifHp6qWc8JjvYm2DEwK6tyg52Ik6REE25H5qz/tg=
+github.com/edwarnicke/vpphelper v0.0.0-20201229173204-87a3b197f1e1/go.mod h1:Vs6aWFIO9nTFhl0qsxEprx0iab0l5Swb5f6srxG2rLI=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=