go.mod: bump wireguard-go version.

Signed-off-by: David Anderson <dave@natulte.net>

go.mod

@@ -20,14 +20,15 @@ require (
 	github.com/peterbourgon/ff/v2 v2.0.0
 	github.com/tailscale/hujson v0.0.0-20190930033718-5098e564d9b3 // indirect
 	github.com/tailscale/winipcfg-go v0.0.0-20200213045944-185b07f8233f
-	github.com/tailscale/wireguard-go v0.0.0-20200311172358-e98fb01bbec2
+	github.com/tailscale/wireguard-go v0.0.0-20200317013323-239518935266
 	golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4
 	golang.org/x/net v0.0.0-20200301022130-244492dfa37a // indirect
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
 	golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e
-	golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527
+	golang.org/x/sys v0.0.0-20200316230553-a7d97aace0b0
 	golang.org/x/time v0.0.0-20191024005414-555d28b269f0
 	gortc.io/stun v1.22.1
 	honnef.co/go/tools v0.0.1-2020.1.3 // indirect
 	rsc.io/goversion v1.2.0
 )
+

go.sum

@@ -182,6 +182,8 @@ golang.org/x/sys v0.0.0-20200301204400-5d559ad92b82 h1:lMQVwSjnOFtj3Ssuec21gK8st
 golang.org/x/sys v0.0.0-20200301204400-5d559ad92b82/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527 h1:uYVVQ9WP/Ds2ROhcaGPeIdVq0RIXVLwsHlnvJ+cT1So=
 golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200316230553-a7d97aace0b0 h1:4Khi5GeNOkZS5DqSBRn4Sy7BE6GuxwOqARPqfurkdNk=
+golang.org/x/sys v0.0.0-20200316230553-a7d97aace0b0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=