MAINT: Lint importing

[Zeroto521]

• closes #xxxx
• whatsnew entry

Gather importing to script top

[codecov]

Codecov Report

Merging #536 (9bb40cf) into main (a0e8d61) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #536   +/-   ##
=======================================
  Coverage   99.64%   99.64%           
=======================================
  Files          63       63           
  Lines         845      845           
  Branches       99       99           
=======================================
  Hits          842      842           
  Misses          1        1           
  Partials        2        2           

Impacted Files	Coverage Δ
dtoolkit/accessor/series/expand.py	100.00% <100.00%> (ø)
dtoolkit/geoaccessor/geoseries/geobuffer.py	100.00% <100.00%> (ø)

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