add url param to config

[PatSpiegel]

For self-hosting dadata

[codecov]

Codecov Report

Merging #39 (e0ed6b3) into master (421d3d9) will increase coverage by 0.57%.
The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master      #39      +/-   ##
==========================================
+ Coverage   37.38%   37.96%   +0.57%     
==========================================
  Files           5        5              
  Lines         107      108       +1     
  Branches       16       16              
==========================================
+ Hits           40       41       +1     
  Misses         66       66              
  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	52.63% <0.00%> (ø)
...rojects/ngx-dadata/src/lib/ngx-dadata.component.ts	30.95% <100.00%> (+0.83%)	⬆️

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