chore: updated Go to version 1.13.4

As part of the Go update the flag.Parse()
function was moved out of init() and into
main() as the test was failing.

.gitlab-ci.yml

@@ -1,5 +1,5 @@
 ---
-image: golang:1.12.9
+image: golang:1.13.4
 
 variables:
   CGO_ENABLED: 0

main.go

@@ -46,10 +46,10 @@ func init() {
 	flag.StringVar(&longBreakTime, "long-break", "20m", "sets the timer for your long break.")
 	flag.IntVar(&maxWorkSessions, "max-work-sessions", 4, "sets the maximum number of work cycles to complete before taking a long break.")
 	flag.BoolVar(&printVersion, "version", false, "print version and exit.")
-	flag.Parse()
 }
 
 func main() {
+	flag.Parse()
 
 	if printVersion {
 		Version()