Allows to specify only request type in query

[Aschen]

What does this PR do ?

Allows to specify only the request type without the result

await sdk.query<ApiDeviceLinkAssetRequest>({ ... });

[codecov]

Codecov Report

Merging #722 (18bfe7c) into master (21dcac8) will not change coverage.
The diff coverage is n/a.

❗ Current head 18bfe7c differs from pull request most recent head e69255c. Consider uploading reports for the commit e69255c to get more accurate results

@@           Coverage Diff           @@
##           master     #722   +/-   ##
=======================================
  Coverage   83.13%   83.13%           
=======================================
  Files          46       46           
  Lines        2111     2111           
  Branches      406      406           
=======================================
  Hits         1755     1755           
  Misses        277      277           
  Partials       79       79           

Impacted Files	Coverage Δ
src/Kuzzle.ts	85.67% <ø> (ø)

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