Rewrite time module

examples/game_of_life/life.v

@@ -73,7 +73,7 @@ fn main() {
 		}
 		field = new_field
 		print_field(field)
-		time.sleep_ms(100)
+		time.sleep(time.milliseconds(100))
 	}
 }
 

examples/news_fetcher.v

@@ -53,6 +53,6 @@ fn main() {
 		go fetcher.fetch()
 	}
 	println(fetcher.ids)
-	time.sleep(5)
+	time.sleep(time.seconds(5))
 }
 

examples/tetris/tetris.v

@@ -17,7 +17,7 @@ const (
 	TetroSize = 4
 	WinWidth = BlockSize * FieldWidth
 	WinHeight = BlockSize * FieldHeight
-	TimerPeriod = 250 // ms
+	TimerPeriod = time.milliseconds(250) // 250ms
 )
 
 const (
@@ -168,7 +168,7 @@ fn (g mut Game) run() {
 		g.move_tetro()
 		g.delete_completed_lines()
 		glfw.post_empty_event() // force window redraw
-		time.sleep_ms(TimerPeriod)
+		time.sleep(TimerPeriod)
 	}
 }