feat: esModule option

[alexander-akait]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

esModule option

Breaking Changes

No

Additional Info

No

[codecov]

Codecov Report

Merging #441 into master will decrease coverage by 0.92%.
The diff coverage is 88.23%.

@@            Coverage Diff             @@
##           master     #441      +/-   ##
==========================================
- Coverage     100%   99.07%   -0.93%     
==========================================
  Files           4        4              
  Lines         202      216      +14     
  Branches       72       85      +13     
==========================================
+ Hits          202      214      +12     
- Misses          0        2       +2

Impacted Files	Coverage Δ
src/index.js	95.55% <88.23%> (-4.45%)	⬇️

---

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 907aed8...e8a9b6c. Read the comment docs.