BLD: pygeos isn't an optional dependency anymore

[Zeroto521]

• closes #xxxx
• whatsnew entry

While import dtoolkit.geoaccessor without pygeos, there wouldn't raise an error.

[codecov]

Codecov Report

Merging #694 (9a44458) into main (9a44458) will not change coverage.
The diff coverage is n/a.

❗ Current head 9a44458 differs from pull request most recent head 0934e66. Consider uploading reports for the commit 0934e66 to get more accurate results

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  Coverage   99.38%   99.38%           
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  Files         112      112           
  Lines        1304     1304           
  Branches      119      119           
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  Hits         1296     1296           
  Misses          2        2           
  Partials        6        6           

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