upgrade netlink

This should fix the ipsec issue on Ubuntu 20.04 (including the CI)

go.mod

@@ -29,7 +29,7 @@ require (
 	github.com/soheilhy/cmux v0.1.5 // indirect
 	github.com/tencentcloud/tencentcloud-sdk-go v1.0.67
 	github.com/tmc/grpc-websocket-proxy v0.0.0-20201229170055-e5319fda7802 // indirect
-	github.com/vishvananda/netlink v1.1.1-0.20201029203352-d40f9887b852
+	github.com/vishvananda/netlink v1.2.0-beta
 	github.com/vishvananda/netns v0.0.0-20200728191858-db3c7e526aae
 	go.etcd.io/etcd v0.5.0-alpha.5.0.20200910180754-dd1b699fc489
 	go.uber.org/zap v1.17.0 // indirect

go.sum

@@ -716,6 +716,8 @@ github.com/vishvananda/netlink v0.0.0-20181108222139-023a6dafdcdf/go.mod h1:+SR5
 github.com/vishvananda/netlink v1.1.0/go.mod h1:cTgwzPIzzgDAYoQrMm0EdrjRUBkTqKYppBueQtXaqoE=
 github.com/vishvananda/netlink v1.1.1-0.20201029203352-d40f9887b852 h1:cPXZWzzG0NllBLdjWoD1nDfaqu98YMv+OneaKc8sPOA=
 github.com/vishvananda/netlink v1.1.1-0.20201029203352-d40f9887b852/go.mod h1:twkDnbuQxJYemMlGd4JFIcuhgX83tXhKS2B/PRMpOho=
+github.com/vishvananda/netlink v1.2.0-beta h1:CTNzkunO9iTkRaupF540+w47mexyQgNkA/ibnuKc39w=
+github.com/vishvananda/netlink v1.2.0-beta/go.mod h1:twkDnbuQxJYemMlGd4JFIcuhgX83tXhKS2B/PRMpOho=
 github.com/vishvananda/netns v0.0.0-20180720170159-13995c7128cc/go.mod h1:ZjcWmFBXmLKZu9Nxj3WKYEafiSqer2rnvPr0en9UNpI=
 github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df/go.mod h1:JP3t17pCcGlemwknint6hfoeCVQrEMVwxRLRjXpq+BU=
 github.com/vishvananda/netns v0.0.0-20200728191858-db3c7e526aae h1:4hwBBUfQCFe3Cym0ZtKyq7L16eZUtYKs+BaHDN6mAns=