Incompatible with latest go versions

[hadmut]

Hi,

go get github.com/ndecker/fritzbox_exporter

works under

• ubuntu 20.04 with ubuntu-packaged go 1.13.8
• alpine 3.13 with go 1.15.12

but not with

• alpine 3.14 with go 1.16.5
• ubuntu 20.04 with snap package go 1.16.6

Error message in both cases:

go/pkg/mod/github.com/ndecker/[email protected]/main.go:326:26: undefined: prometheus.Handler

[hadmut]

Solution:

add "github.com/prometheus/client_golang/prometheus/promhttp" to imports and replace prometheus.Handler with promhttp.Handler

[ndecker]

Hello @hadmut , i have updated the dependencies. It builds with current go and prometheus client.