fix: more consistent cache

[alexander-akait]

This PR contains a:

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

Motivation / Use-Case

Don't use path as part of cache keys, so files with same content do have one cache entry

Breaking Changes

No

Additional Info

No

[codecov]

Codecov Report

Merging #385 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #385      +/-   ##
==========================================
- Coverage   98.54%   98.52%   -0.02%     
==========================================
  Files           5        5              
  Lines         274      272       -2     
  Branches      108      107       -1     
==========================================
- Hits          270      268       -2     
  Misses          4        4

Impacted Files	Coverage Δ
src/index.js	97.94% <ø> (-0.03%)	⬇️

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