feat: remove cjs wrapper and improve types format

[alexander-akait]

This PR contains a:

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

Motivation / Use-Case

removed cjs wrapper and generated types in commonjs format (export = and namespaces used in types), now you can directly use exported types

Breaking Changes

Potentially yes, but we use babel and our code in commonjs format, but typescript generate ESM format for declarations, it is bug

Additional Info

No

[codecov]

Codecov Report

Merging #463 (b5f29ad) into master (d5146c9) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #463      +/-   ##
==========================================
+ Coverage   97.03%   97.11%   +0.07%     
==========================================
  Files           4        3       -1     
  Lines         304      312       +8     
  Branches      114      114              
==========================================
+ Hits          295      303       +8     
  Misses          9        9              

Impacted Files	Coverage Δ
src/index.js	97.34% <100.00%> (+0.10%)	⬆️
src/minify.js	100.00% <100.00%> (ø)
src/utils.js	95.00% <100.00%> (+0.12%)	⬆️

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