🐛 bug(index): evaluate availabilities lazily (fix #477)

[gamtiq]

No description provided.

[codecov-io]

Codecov Report

Merging #483 into dev will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              dev     #483      +/-   ##
==========================================
+ Coverage   96.64%   96.65%   +0.01%     
==========================================
  Files           9        9              
  Lines         655      657       +2     
==========================================
+ Hits          633      635       +2     
  Misses         22       22

Impacted Files	Coverage Δ
src/util.js	98.18% <ø> (-0.07%)	⬇️
src/index.js	99.63% <100%> (ø)	⬆️

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[codecov-io]

Codecov Report

Merging #483 into dev will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##              dev     #483      +/-   ##
==========================================
+ Coverage   96.64%   96.65%   +0.01%     
==========================================
  Files           9        9              
  Lines         655      657       +2     
==========================================
+ Hits          633      635       +2     
  Misses         22       22

Impacted Files	Coverage Δ
src/util.js	98.18% <ø> (-0.07%)	⬇️
src/index.js	99.63% <100%> (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 b4a8c27...ec65665. Read the comment docs.

[kazupon]

Thanks! good job! 👍

[exoego]

@gamtiq
FYI, the issue #477 has a fund on IssueHunt https://issuehunt.io/repos/19382828/issues/477
If you submit this PR that resolved #477, you can grab the fund.