add Mkdirs

[smola]

No description provided.

[smola]

Depends on #12

[codecov-io]

Codecov Report

Merging #14 into master will decrease coverage by -0.47%.
The diff coverage is 70.83%.

@@            Coverage Diff             @@
##           master      #14      +/-   ##
==========================================
- Coverage   84.58%   84.12%   -0.47%     
==========================================
  Files           2        2              
  Lines         279      296      +17     
==========================================
+ Hits          236      249      +13     
- Misses         28       30       +2     
- Partials       15       17       +2

Impacted Files	Coverage Δ
memfs/memory.go	86.12% <68.42%> (-1.06%)	❌
osfs/os.go	79.31% <80%> (+0.73%)	✅

---

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 9c1722d...8209194. Read the comment docs.