go.mod: update to new wireguard-go.
@@ -23,7 +23,7 @@ require (
github.com/pborman/getopt v0.0.0-20190409184431-ee0cd42419d3
github.com/peterbourgon/ff/v2 v2.0.0
github.com/tailscale/depaware v0.0.0-20201003033024-5d95aab075be
- github.com/tailscale/wireguard-go v0.0.0-20201008164108-2c83f43a9859
+ github.com/tailscale/wireguard-go v0.0.0-20201021041318-a6168fd06b3f
github.com/tcnksm/go-httpstat v0.2.0
github.com/toqueteos/webbrowser v1.2.0
go4.org/mem v0.0.0-20200706164138-185c595c3ecc
