Pandas pinned to < 2.1.0 about pyemu

[briochh]

e.g.

• There seem to be issues setting a new column as a string using the .loc[idx, col] slice accessor: pandas-dev/pandas#55025. Presumably the internals set the column to np.nan which is then falling short of the impending strict upcasting ban https://pandas.pydata.org/pdeps/0006-ban-upcasting.html when it try to put str values in there. Results in > "FutureWarning: Setting an item of incompatible dtype is deprecated and will raise in a future error of pandas."
• There is a bug in 2.1 that is not dealing with columns containing commas when reading whitespace delimited pandas-dev/pandas#54918
• Concatenating with an empty dataframe now also raises a warning. Either we need to ensure not empty before or (eventually) dropna(all) after concatenation (I think); I guess the latter will continue to raise a warning for now...
• Accessing series entries using numpy-like index df.col[i] is deprecated. The expectation now is to use df.col.iloc[i] or presumably, df.col.values[i] or maybe df.iloc[i].col (maybe?!)

[briochh]

also:

• FutureWarning: The argument 'date_parser' is deprecated and will be removed in a future version. So may need a bit of a hack around this...