chore(themes): add buefy configuration

[ming-tsai]

Live demo

[codecov]

Codecov Report

Merging #193 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #193   +/-   ##
=======================================
  Coverage   94.76%   94.76%           
=======================================
  Files          15       15           
  Lines         382      382           
  Branches      115      115           
=======================================
  Hits          362      362           
  Misses         16       16           
  Partials        4        4           

Impacted Files	Coverage Δ
themes/index.js	100.00% <ø> (ø)

---

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 6d1b1e2...a426fe2. Read the comment docs.

[anuraghazra]

This looks good @ming-tsai thanks!