fix: enable all features for vortex-mask docsrs and enable serde-derive when serde is enabled

[robert3005]

Signed-off-by: Robert Kruszewski [email protected]

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.95%. Comparing base (eb5c300) to head (61afd4d).
⚠️ Report is 2 commits behind head on develop.

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