Merge pull request #983 from Axelrod-Python/mypy_random

Add the random_ module to mypy tester.

Author: meatballs

run_mypy.py

@@ -8,6 +8,7 @@
            "axelrod/mock_player.py",
            "axelrod/moran.py",
            "axelrod/plot.py",
+           "axelrod/random_.py",
            "axelrod/tournament.py",
            "axelrod/strategies/adaptive.py",
            "axelrod/strategies/alternator.py",