ResourceWarning From Unclosed Files

I've been getting the following warning message when using GPy. (It actually doesn't occur upon import, and I don't know exactly when it occurs.)

/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/GPy/util/config.py:35: ResourceWarning: unclosed file <_io.TextIOWrapper name='/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/GPy/defaults.cfg' mode='r' encoding='UTF-8'> config.readfp(open(default_file)) ResourceWarning: Enable tracemalloc to get the object allocation traceback /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/GPy/util/datasets.py:58: ResourceWarning: unclosed file <_io.TextIOWrapper name='/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/GPy/util/data_resources.json' mode='r' encoding='utf-8'> json_data = open(path, encoding='utf-8').read() ResourceWarning: Enable tracemalloc to get the object allocation traceback /Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/GPy/util/datasets.py:63: ResourceWarning: unclosed file <_io.TextIOWrapper name='/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/GPy/util/football_teams.json' mode='r' encoding='utf-8'> json_data = open(path, encoding='utf-8').read() ResourceWarning: Enable tracemalloc to get the object allocation traceback

This seems to result from a few files (in GPy/util/dataset.py and GPy/util/config.py) that are opened and not closed. I've fixed it by replacing the relevant "open" statements with "with open". Please let me know if I should make a pull request with this change.

Read GPy/util/config.py and GPy/util/datasets.py, focusing on the open calls identified in the warning messages. Reproduce the reported ResourceWarning and verify that the affected files are closed after the change.