headers are always strings #1667

Job	Run time
Lint	36s
Lint	36s
Smoke test - cli (macos-latest, 18.x)	2m 35s
Smoke test - cli (macos-latest, 18.x)	2m 35s
Test - cli (macos-latest, 18.x)	57s
Test - cli (macos-latest, 18.x)	57s
Smoke test - cli (macos-latest, 20.x)	2m 34s
Smoke test - cli (macos-latest, 20.x)	2m 34s
Smoke test - core, schema (18.x)	1m 37s
Smoke test - core, schema (18.x)	1m 37s
Test - cli (macos-latest, 20.x)	1m 21s
Test - cli (macos-latest, 20.x)	1m 21s
Test - core, schema, legacy-scripting-runner (18.x)	44s
Test - core, schema, legacy-scripting-runner (18.x)	44s
Smoke test - cli (ubuntu-latest, 18.x)	2m 14s
Smoke test - cli (ubuntu-latest, 18.x)	2m 14s
Smoke test - core, schema (20.x)	1m 31s
Smoke test - core, schema (20.x)	1m 31s
Test - cli (ubuntu-latest, 18.x)	49s
Test - cli (ubuntu-latest, 18.x)	49s
Test - core, schema, legacy-scripting-runner (20.x)	48s
Test - core, schema, legacy-scripting-runner (20.x)	1m 10s
Smoke test - cli (ubuntu-latest, 20.x)	2m 0s
Smoke test - cli (ubuntu-latest, 20.x)	2m 0s
Test - cli (ubuntu-latest, 20.x)	51s
Test - cli (ubuntu-latest, 20.x)	51s
Test - schema-to-ts	22s
Test - schema-to-ts	22s
	38m 20s

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