Fix base writer to work with shapely 2.0+

[djhoese]

I think this might be a more flexible replacement for #18's problem. That is the temporary shapefile that was being made was only being used as a container...so let's not create the container and just make functions accept the lists/arrays directly.

• Closes Use a tempfile for the dummy shape objects. #18
• Tests added
• Tests passed
• Passes git diff origin/develop **/*py | flake8 --diff

[howff]

Phew, that works for me, thank you!

[coveralls]

Coverage increased (+24.5%) to 79.94% when pulling 0d825bc on bugfix-new-shapely into c9d5fe4 on master.