Don't panic if getting the info fails

Print an error instead.

go/inquire/inquire.go

@@ -52,7 +52,8 @@ func main() {
	info, err := GetPageInfo(u)
	if err != nil {
		panic(err)
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	switch config.output {