Example in the readme is not working

[cyd3r]

The example in the readme is not updated and still uses the get_players method which is not available anymore in the master branch.

Steps to reproduce:

• pip install understat
• run the example

I get the following error:

Traceback (most recent call last):
  File "test.py", line 18, in <module>
    loop.run_until_complete(main())
  File "/usr/lib/python3.7/asyncio/base_events.py", line 584, in run_until_complete
    return future.result()
  File "test.py", line 12, in main
    data = await understat.get_players("epl", 2019, {"team_title": "Manchester United"})
AttributeError: 'Understat' object has no attribute 'get_players'

Works fine with version 0.1.0 though

[amosbastian]

Fixed the example, thanks!