Imio.pyutils

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- Nothing changed yet.

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- Improved datetime import in system to correct load_var evaluation.
[sgeulette]

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- Improved `batching.batch_delete_files`.
[sgeulette]

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- Generated universal wheel version.
[sgeulette]

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- Added `utils.add_key_if_value` to add a key in a dic only if value or is not None.
[sgeulette]
- Moved `batching.batch_delete_files` from imio.helpers to be used commonly.
[sgeulette]

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- Blacked files.
[sgeulette]
- Added `system.post_request` to send a POST request.
[sgeulette]