refactor: error code

[alexander-akait]

This PR contains a:

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

Motivation / Use-Case

refactor error code, no need to lose memory on original error

Breaking Changes

Yes, if you use original error, but I don't think somebody to use it

Additional Info

No

[codecov]

Codecov Report

Merging #1053 (6f181f5) into master (040a511) will increase coverage by 0.23%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1053      +/-   ##
==========================================
+ Coverage   93.83%   94.07%   +0.23%     
==========================================
  Files           5        5              
  Lines         373      371       -2     
  Branches      138      137       -1     
==========================================
- Hits          350      349       -1     
+ Misses         21       20       -1     
  Partials        2        2              

Impacted Files	Coverage Δ
src/SassError.js	100.00% <100.00%> (+6.66%)	⬆️

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