fix deprecated collections reference

ssato / python-anyconfig

Python library provides common APIs to load and dump configuration files in various formats

MIT License

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fix deprecated collections reference #115

Closed rhilfers closed 4 years ago

rhilfers commented 4 years ago

utils.py:408: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and in 3.9 it will stop working

ssato commented 4 years ago

Thanks a lot for your PR! Good point.

LGTM and merged into the next branch. (I changed the base branch to merge.)