Convert project to have TypeScript files, add linting and build using microbundle

[evansiroky]

Fixes #109.
Supersedes #112.

[codecov-commenter]

Codecov Report

Merging #128 (debc6ca) into master (015df06) will decrease coverage by 7.71%.
The diff coverage is 88.73%.

@@            Coverage Diff             @@
##           master     #128      +/-   ##
==========================================
- Coverage   90.40%   82.69%   -7.72%     
==========================================
  Files           4        4              
  Lines         198      312     +114     
  Branches       41       59      +18     
==========================================
+ Hits          179      258      +79     
- Misses         19       34      +15     
- Partials        0       20      +20     

Impacted Files	Coverage Δ
src/update.ts	79.31% <79.31%> (ø)
src/find.ts	78.84% <93.54%> (ø)
src/geo-index.ts	85.50% <95.91%> (ø)
src/oceanUtils.ts	100.00% <100.00%> (ø)

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[evansiroky]

🎉 This PR is included in version 7.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀