ENH: Add vectorize function

[snowman2]

• [x] Closes #65
• [x] Tests added
• [x] Fully documented, including docs/history.rst for all changes and docs/geocube.rst for new API

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.09 :tada:

Comparison is base (ca62d68) 97.16% compared to head (d59db38) 97.26%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #135 +/- ## ========================================== + Coverage 97.16% 97.26% +0.09% ========================================== Files 14 15 +1 Lines 424 438 +14 ========================================== + Hits 412 426 +14 Misses 12 12 ``` | [Impacted Files](https://codecov.io/gh/corteva/geocube/pull/135?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=corteva) | Coverage Δ | | |---|---|---| | [geocube/vector.py](https://codecov.io/gh/corteva/geocube/pull/135?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=corteva#diff-Z2VvY3ViZS92ZWN0b3IucHk=) | `100.00% <100.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=corteva). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=corteva)

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[snowman2]

Thanks @Zionett @justingruca :+1: