I am using cartopy.io.shapereader.gshhs.
Noticed this output while processing:

Downloading: https://www.ngdc.noaa.gov/mgg/shorelines/data/gshhs/oldversions
/version2.2.0/GSHHS_shp_2.2.0.zip

Version 2.2.0 is old (2013), recent version is 2.3.7 (June 15, 2017), available here:
https://www.ngdc.noaa.gov/mgg/shorelines/data/gshhg/latest/

Can be updated to a more recent version if not the latest?