Update dependency basemap to v1.3.8

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
basemap (source)	==1.3.7 -> ==1.3.8

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Release Notes

matplotlib/basemap (basemap)

v1.3.8

Compare Source

Changed

• Upgrade numpy upper pin to 1.26.
• Upgrade pyproj upper pin to 3.7.
• Upgrade optional pillow upper pin to 10.1.0.
• Upgrade documentation and linting dependencies.

Fixed

• Fix Cygwin build error due to GCC passing "--enable-new-dtags" to
  the linker (PR [#​582] by @​DWesl, solves issue [#​579]).
• Fix deprecated Image.ANTIALIAS with Image.LANCZOS when pillow
  version is at least 10.0.0 (PR [#​580] by @​cgohlke).
• Downgrade upper pin for Cython requirement from 3.1 to 3.0 due to
  build error triggered by _geoslib.pyx (solves issues [#​581] and
  [#​583]).
• Downgrade numpy lower pin to numpy >= 1.21 for Python >= 3.8,
  whose upgrade is delayed until basemap 1.4.0.

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