Fix import of turbodbc_arrow on Windows

[codecov-commenter]

Codecov Report

Base: 98.87% // Head: 98.81% // Decreases project coverage by -0.07% :warning:

Coverage data is based on head (f014eb8) compared to base (072ecfe). Patch coverage: 81.81% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #382 +/- ## ========================================== - Coverage 98.87% 98.81% -0.07% ========================================== Files 93 94 +1 Lines 3026 3033 +7 ========================================== + Hits 2992 2997 +5 - Misses 34 36 +2 ``` | [Impacted Files](https://codecov.io/gh/blue-yonder/turbodbc/pull/382?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=blue-yonder) | Coverage Δ | | |---|---|---| | [python/turbodbc/arrow\_support.py](https://codecov.io/gh/blue-yonder/turbodbc/pull/382?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=blue-yonder#diff-cHl0aG9uL3R1cmJvZGJjL2Fycm93X3N1cHBvcnQucHk=) | `71.42% <71.42%> (ø)` | | | [python/turbodbc/cursor.py](https://codecov.io/gh/blue-yonder/turbodbc/pull/382?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=blue-yonder#diff-cHl0aG9uL3R1cmJvZGJjL2N1cnNvci5weQ==) | `99.01% <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=blue-yonder). 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=blue-yonder)

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