fix: typescript definitions

[alexander-akait]

This PR contains a:

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

Motivation / Use-Case

fix typescript definitions

Breaking Changes

No

Additional Info

No

[codecov]

Codecov Report

Merging #70 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #70   +/-   ##
=======================================
  Coverage   98.59%   98.59%           
=======================================
  Files           5        5           
  Lines         568      568           
  Branches      255      255           
=======================================
  Hits          560      560           
  Misses          8        8

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b98e06c...28f5fd8. Read the comment docs.

[vankop]

@evilebottnawi do you mind to PR this fix in ajv?

[alexander-akait]

@vankop no need, we add children property in our code so we should provide other type