species value inflation adjustment data

[andybeet]

The function adjust_inflation used to pull a monthly inflation time series from a government website.

In the past there were issues pulling this data and the package changed to handle a data object that was bundled with the package. comlandr::deflate. This is hard to maintain and we need to revert back to the previous method.

Questions @gdepiper :

Is this still the correct url? : http://download.bls.gov/pub/time.series/wp/wp.data.3.ProcessedFoods
If so, how is the correct series_id determined? We were previously using WPU0223.