handle all future warnings

[aerispaha]

Minor refactoring to address all of the current FutureWarnings and PytestUnknownMarkWarning raised by the tests. This wrangles a few references to delim_whitespace that slipped through the cracks in addition to many instances of the follow warnings:

• FutureWarning: The behavior of DataFrame concatenation with empty or all-NA entries is deprecated.
• FutureWarning: Downcasting object dtype arrays on .fillna, .ffill, .bfill is deprecated and will change in a future version.
• FutureWarning: Setting an item of incompatible dtype is deprecated and will raise an error in a future version of pandas.
• PytestUnknownMarkWarning: Unknown pytest.mark.uses_geopandas

After these changes, warnings raised when running tests should reduce from 107 to 15.

Note

The remaining 15 warnings are raised by swmmio itself, in situations where the dataframe_from_inp function attempts to extract a section of the INP that is not found. For example:

UserWarning: ORIFICES section not found in /swmmio/swmmio/tests/data/model_full_features_network_xy.inp

I'm tired of seeing these warnings too. But in some cases these may be important. Maybe we can provide a user config that optionally silences these? I'm open to ideas. But we can tackle that separately

[bemcdonnell]

@aerispaha