Assert that vec length is at least LENGTH.

[brndnmtthws]

This resolves #23.

[netlify[bot]]

✅ Deploy Preview for dryoc-docs ready!

Name	Link
🔨 Latest commit	137b80c436a29d2a17493fc4cafd38fb281716ee
🔍 Latest deploy log	https://app.netlify.com/sites/dryoc-docs/deploys/6363cebd9300a70008f72954
😎 Deploy Preview	https://deploy-preview-24--dryoc-docs.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.

[codecov[bot]]

Codecov Report

Merging #24 (99c4261) into main (d1e92f5) will decrease coverage by 0.01%. The diff coverage is 50.00%.

:exclamation: Current head 99c4261 differs from pull request most recent head 137b80c. Consider uploading reports for the commit 137b80c to get more accurate results

@@            Coverage Diff             @@
##             main      #24      +/-   ##
==========================================
- Coverage   65.36%   65.34%   -0.02%     
==========================================
  Files          44       44              
  Lines        3164     3168       +4     
==========================================
+ Hits         2068     2070       +2     
- Misses       1096     1098       +2     

Impacted Files	Coverage Δ
src/types.rs	46.87% <50.00%> (+0.08%)	:arrow_up:

:mega: We’re building smart automated test selection to slash your CI/CD build times. Learn more