module: update github.com/eclipse/paho.mqtt.golang to version 1.3.1

Bumps [github.com/eclipse/paho.mqtt.golang](https://github.com/eclipse/paho.mqtt.golang) from 1.3.0 to 1.3.1 (#66).
- [Release notes](https://github.com/eclipse/paho.mqtt.golang/releases)
- [Commits](https://github.com/eclipse/paho.mqtt.golang/compare/v1.3.0...v1.3.1)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -5,7 +5,7 @@ go 1.15
 require (
 	github.com/currantlabs/gatt v0.0.0-20161006170101-f949eac78f4e
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/eclipse/paho.mqtt.golang v1.3.0
+	github.com/eclipse/paho.mqtt.golang v1.3.1
 	github.com/go-ble/ble v0.0.0-20200120171844-0a73a9da88eb
 	github.com/pkg/errors v0.9.1
 	github.com/stretchr/testify v1.6.1

go.sum

@@ -5,8 +5,8 @@ github.com/currantlabs/gatt v0.0.0-20161006170101-f949eac78f4e/go.mod h1:GCdlaU9
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/eclipse/paho.mqtt.golang v1.3.0 h1:MU79lqr3FKNKbSrGN7d7bNYqh8MwWW7Zcx0iG+VIw9I=
-github.com/eclipse/paho.mqtt.golang v1.3.0/go.mod h1:eTzb4gxwwyWpqBUHGQZ4ABAV7+Jgm1PklsYT/eo8Hcc=
+github.com/eclipse/paho.mqtt.golang v1.3.1 h1:6F5FYb1hxVSZS+p0ji5xBQamc5ltOolTYRy5R15uVmI=
+github.com/eclipse/paho.mqtt.golang v1.3.1/go.mod h1:eTzb4gxwwyWpqBUHGQZ4ABAV7+Jgm1PklsYT/eo8Hcc=
 github.com/go-ble/ble v0.0.0-20200120171844-0a73a9da88eb h1:YLbB9CgjUw1U9GxEqGvM2ld9YqHRoBeEEM7f8A8l9x0=
 github.com/go-ble/ble v0.0.0-20200120171844-0a73a9da88eb/go.mod h1:nwmyxHsP2cqjashMTTAl3A5t6V3vzev1rLgMb/pZ7jc=
 github.com/gorilla/websocket v1.4.2 h1:+/TMaTYc4QFitKJxsQ7Yye35DkWvkdLcvGKqM+x0Ufc=