fix: typescript and naming

[alexander-akait]

This PR contains a:

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

Motivation / Use-Case

Use original name - ValidationError

Also run prettier on this file

Breaking Changes

No, keep old name too

Additional Info

No

[codecov]

Codecov Report

Merging #69 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #69      +/-   ##
==========================================
+ Coverage   98.58%   98.59%   +<.01%     
==========================================
  Files           5        5              
  Lines         567      568       +1     
  Branches      255      255              
==========================================
+ Hits          559      560       +1     
  Misses          8        8

Impacted Files	Coverage Δ
src/index.js	100% <100%> (ø)	⬆️

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