update go-rpio to v4.6.0 to support raspi4b.

Signed-off-by: xingleigao <[email protected]>

Author: xingleigao

Diff for: led-raspberrypi/go.mod

@@ -5,6 +5,6 @@ go 1.14
 require (
 	github.com/eclipse/paho.mqtt.golang v1.3.1
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
-	github.com/stianeikeland/go-rpio v4.2.0+incompatible
+	github.com/stianeikeland/go-rpio/v4 v4.6.0
 	gopkg.in/yaml.v2 v2.4.0
 )

Diff for: led-raspberrypi/go.sum

@@ -4,8 +4,8 @@ github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekf
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=
 github.com/gorilla/websocket v1.4.2/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
-github.com/stianeikeland/go-rpio v4.2.0+incompatible h1:CUOlIxdJdT+H1obJPsmg8byu7jMSECLfAN9zynm5QGo=
-github.com/stianeikeland/go-rpio v4.2.0+incompatible/go.mod h1:Sh81rdJwD96E2wja2Gd7rrKM+XZ9LrwvN2w4IXrqLR8=
+github.com/stianeikeland/go-rpio/v4 v4.6.0 h1:eAJgtw3jTtvn/CqwbC82ntcS+dtzUTgo5qlZKe677EY=
+github.com/stianeikeland/go-rpio/v4 v4.6.0/go.mod h1:A3GvHxC1Om5zaId+HqB3HKqx4K/AqeckxB7qRjxMK7o=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0 h1:Jcxah/M+oLZ/R4/z5RzfPzGbPXnVDPkEDtf2JnuxN+U=
 golang.org/x/net v0.0.0-20200425230154-ff2c4b7c35a0/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=

Diff for: led-raspberrypi/light_driver/light_driver.go

@@ -4,7 +4,7 @@ import (
 	"os"
 
 	"github.com/golang/glog"
-	"github.com/stianeikeland/go-rpio"
+	"github.com/stianeikeland/go-rpio/v4"
 )
 
 func TurnON(pinNumber int64) {