Fix service request payload

[SamarinDV]

Added restrict_value
Fix service request payload

[codecov]

Codecov Report

Merging #9 into master will decrease coverage by 0.35%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master       #9      +/-   ##
==========================================
- Coverage   39.63%   39.28%   -0.36%     
==========================================
  Files           5        5              
  Lines         111      112       +1     
  Branches       16       17       +1     
==========================================
  Hits           44       44              
- Misses         66       67       +1     
  Partials        1        1              

Impacted Files	Coverage Δ
projects/ngx-dadata/src/lib/dadata-config.ts	100.00% <ø> (ø)
projects/ngx-dadata/src/lib/ngx-dadata.service.ts	50.00% <0.00%> (-2.64%)	⬇️

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