Merge pull request #204 from hey-api/fix/pass-correct-content-type-wi… #281

Job	Run time
Build, Lint, Test (macos-latest, 18.x)	3m 53s
Build, Lint, Test (macos-latest, 20.x)	6m 45s
Build, Lint, Test (macos-latest, 21.x)	4m 10s
Build, Lint, Test (ubuntu-latest, 18.x)	3m 3s
Build, Lint, Test (ubuntu-latest, 20.x)	2m 47s
Build, Lint, Test (ubuntu-latest, 21.x)	3m 29s
Build, Lint, Test (windows-latest, 18.x)	4m 51s
Build, Lint, Test (windows-latest, 20.x)	4m 31s
Build, Lint, Test (windows-latest, 21.x)	4m 4s
	37m 33s

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