chore: fake ESMを純粋なESMに置き換え、commonjsとesmodule用にエクスポートするように

[ikasoba]

What

• fake ESMとしてビルドされていたものを純粋なESMとしてビルドされるようソースコードを一部置換
• esmodule と commonjs の双方から利用できるように

Why

#308 を解決するため

Additional info (optional)

[codecov]

Codecov Report

Patch coverage: 97.43% and project coverage change: +0.04% 🎉

Comparison is base (b6ca5fc) 87.79% compared to head (43cd9bf) 87.84%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #310      +/-   ##
==========================================
+ Coverage   87.79%   87.84%   +0.04%     
==========================================
  Files          19       20       +1     
  Lines        3203     3224      +21     
  Branches      524      526       +2     
==========================================
+ Hits         2812     2832      +20     
- Misses        380      381       +1     
  Partials       11       11              

Files Changed	Coverage Δ
src/@types/parser.d.ts	0.00% <0.00%> (ø)
src/utils/mini-autobind.ts	95.23% <95.23%> (ø)
src/index.ts	100.00% <100.00%> (ø)
src/interpreter/index.ts	91.15% <100.00%> (ø)
src/interpreter/lib/std.ts	74.69% <100.00%> (ø)
src/interpreter/primitive-props.ts	97.63% <100.00%> (ø)
src/interpreter/scope.ts	92.10% <100.00%> (ø)
src/interpreter/util.ts	68.71% <100.00%> (ø)
src/interpreter/value.ts	100.00% <100.00%> (ø)
src/parser/index.ts	82.95% <100.00%> (ø)
... and 7 more

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[syuilo]

🙏🙏🙏