test: Use short syntax for queries and mutations

[IvanGoncharov]

No description provided.

[codecov]

Codecov Report

Merging #318 (0df6d12) into main (8c9c7d6) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main      #318   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           19        19           
  Lines          587       587           
  Branches        36        36           
=========================================
  Hits           587       587           

Impacted Files	Coverage Δ
src/__tests__/starWarsConnectionTests.js	100.00% <ø> (ø)
src/__tests__/starWarsMutationTests.js	100.00% <ø> (ø)
src/__tests__/starWarsObjectIdentificationTests.js	100.00% <ø> (ø)
src/connection/__tests__/connection.js	100.00% <ø> (ø)
src/mutation/__tests__/mutation.js	100.00% <ø> (ø)

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