The generate command crashes for hangouts service

[JonasPf]

On current master:

$ go run cli/main.go generate hangouts
Generating URL for hangouts using basic generator
Enter the configuration values as prompted

panic: interface conversion: *hangouts.Config is not types.ServiceConfig: missing method GetURL

goroutine 1 [running]:
github.com/containrrr/shoutrrr/pkg/format.GetServiceConfigFormat(0x169c820, 0xc00000ea60, 0x0, 0x0, 0x0, 0x1, 0x0)
	/Users/jonas/projects/blockdaemon/shoutrrr-upstream/pkg/format/formatter.go:38 +0x17e
github.com/containrrr/shoutrrr/pkg/generators/basic.(*Generator).Generate(0x19b14a8, 0x169c820, 0xc00000ea60, 0xc0001a0120, 0xc000075590, 0x1, 0x1, 0x0, 0xc000199cc8, 0x13f6a86, ...)
	/Users/jonas/projects/blockdaemon/shoutrrr-upstream/pkg/generators/basic/basic.go:23 +0xe5
github.com/containrrr/shoutrrr/cli/cmd/generate.Run(0x1977240, 0xc000075590, 0x1, 0x1)
	/Users/jonas/projects/blockdaemon/shoutrrr-upstream/cli/cmd/generate/generate.go:119 +0x774
github.com/spf13/cobra.(*Command).execute(0x1977240, 0xc000075570, 0x1, 0x1, 0x1977240, 0xc000075570)
	/Users/jonas/go/pkg/mod/github.com/spf13/[email protected]/command.go:842 +0x2c2
github.com/spf13/cobra.(*Command).ExecuteC(0x1977a20, 0x0, 0x0, 0xc000096058)
	/Users/jonas/go/pkg/mod/github.com/spf13/[email protected]/command.go:943 +0x336
github.com/spf13/cobra.(*Command).Execute(...)
	/Users/jonas/go/pkg/mod/github.com/spf13/[email protected]/command.go:883
main.main()
	/Users/jonas/projects/blockdaemon/shoutrrr-upstream/cli/main.go:26 +0x2d
exit status 2