Minor cleanup; Add ability to unfold to cats.free.Cofree

[andyscott]

No description provided.

[codecov]

Codecov Report

Merging #28 into master will decrease coverage by 0.56%.
The diff coverage is 61.53%.

@@            Coverage Diff             @@
##           master      #28      +/-   ##
==========================================
- Coverage   81.33%   80.76%   -0.57%     
==========================================
  Files          15       15              
  Lines         150      156       +6     
==========================================
+ Hits          122      126       +4     
- Misses         28       30       +2

Impacted Files	Coverage Δ
...rc/main/scala/qq/droste/util/DefaultTraverse.scala	0% <ø> (ø)
athema/src/main/scala/qq/athema/expr.scala	80% <ø> (ø)	⬆️
...s/core/src/main/scala/qq/droste/data/package.scala	33.33% <40%> (ø)	⬆️
...s/core/src/main/scala/qq/droste/data/prelude.scala	50% <50%> (ø)	⬆️
modules/core/src/main/scala/qq/droste/basis.scala	87.5% <83.33%> (-12.5%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 36df1ac...6527231. Read the comment docs.