Update dependencies

vendor/github.com/tailscale/wireguard-go/tun/errors.go

@@ -0,0 +1,12 @@
+package tun
+
+import (
+	"errors"
+)
+
+var (
+	// ErrTooManySegments is returned by Device.Read() when segmentation
+	// overflows the length of supplied buffers. This error should not cause
+	// reads to cease.
+	ErrTooManySegments = errors.New("too many segments")
+)