fix: stop and drain timers (#993)

Signed-off-by: Carlos Alexandro Becker <caarlos0@users.noreply.github.com>

commands.go

@@ -94,11 +94,16 @@ type sequenceMsg []Cmd
 //
 // Every is analogous to Tick in the Elm Architecture.
 func Every(duration time.Duration, fn func(time.Time) Msg) Cmd {
+	n := time.Now()
+	d := n.Truncate(duration).Add(duration).Sub(n)
+	t := time.NewTimer(d)
 	return func() Msg {
-		n := time.Now()
-		d := n.Truncate(duration).Add(duration).Sub(n)
-		t := time.NewTimer(d)
-		return fn(<-t.C)
+		ts := <-t.C
+		t.Stop()
+		for len(t.C) > 0 {
+			<-t.C
+		}
+		return fn(ts)
 	}
 }
 
@@ -141,9 +146,14 @@ func Every(duration time.Duration, fn func(time.Time) Msg) Cmd {
 //	    return m, nil
 //	}
 func Tick(d time.Duration, fn func(time.Time) Msg) Cmd {
+	t := time.NewTimer(d)
 	return func() Msg {
-		t := time.NewTimer(d)
-		return fn(<-t.C)
+		ts := <-t.C
+		t.Stop()
+		for len(t.C) > 0 {
+			<-t.C
+		}
+		return fn(ts)
 	}
 }