Checkpoint 3

What I changed
I changed the computer to use the lookahead strategy rather than the random picker strategy.

Why I changed it
It's boring to play agains the computer when all it does is pick a random available spot. When the computer
plays intelligently it's more interesting and difficult.

Estimate for remaining time to finish assignment: [30 minutes to an hour]

ttt/player.py

@@ -1,5 +1,6 @@
 from click import Choice, prompt
 from strategy.random_strategy import RandomStrategy
+from strategy.lookahead_strategy import LookaheadStrategy
 from ttt.game import TTTGame
 import random
 
@@ -24,7 +25,7 @@ class TTTComputerPlayer:
     def __init__(self, name):
         "Sets up the player."
         self.name = name
-        self.strategy = RandomStrategy(TTTGame())
+        self.strategy = LookaheadStrategy(TTTGame())
 
     def choose_action(self, state):
         "Chooses a random move from the moves available."