chore: address pandas futurewarning from "M" being deprecated

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Tool for producing high quality forecasts for time series data that has multiple seasonality with linear or non-linear growth.

https://facebook.github.io/prophet

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chore: address pandas futurewarning from "M" being deprecated #2632

Closed MarcoGorelli closed 1 month ago

MarcoGorelli commented 1 month ago

pandas renamed 'M' (month-end) to be 'ME'

The change suggested here makes the test compatible across current and future pandas versions and avoids the FutureWarning (which is set to become an error in pandas 3.0)