encoding fix

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 88.88889% with 1 line in your changes missing coverage. Please review.

Project coverage is 88.78%. Comparing base (9d7f4a2) to head (cbe1770).

Files	Patch %	Lines
prosodic/utils.py	50.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #67 +/- ## ======================================= Coverage 88.78% 88.78% ======================================= Files 29 29 Lines 3193 3193 ======================================= Hits 2835 2835 Misses 358 358 ``` | [Flag](https://app.codecov.io/gh/quadrismegistus/prosodic/pull/67/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Dr.+Ryan+Heuser) | Coverage Δ | | |---|---|---| | [python](https://app.codecov.io/gh/quadrismegistus/prosodic/pull/67/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Dr.+Ryan+Heuser) | `88.78% <88.88%> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Dr.+Ryan+Heuser#carryforward-flags-in-the-pull-request-comment) to find out more.

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