Update boxscore.py

[DoubleBarrelBirds]

fix NBA home_wins, home_losses, away_wins, away_losses if NBA team is the 76ers. The re findall \d will match the 76 in 76ers and result in in accurate results.

This can be tested by the following

data = {'away_losses': [4.0, None],
        'away_wins'  : [4.0, None],
        'home_losses': [None, 1.0],
        'home_wins'  : [None, 2.0]}
expected_values_df = pd.DataFrame(data, columns = ['away_losses','away_wins', 'home_losses', 'home_wins'], index=['201810300TOR','201810200PHI'])

x1 = Boxscore("201810300TOR").dataframe[['away_losses', 'away_wins']]
x2 = Boxscore("201810200PHI").dataframe[['home_losses', 'home_wins']]

x1.append(x2).equals(expected_values_df)

I'm not a Python programmer, so there may be better ways to resolve. Hoping this will help get the item resolved.