Strict-Transport-Security middleware should throw, not warn, when misspelling "includeSubDomains" option

[EvanHahn]

This should throw instead:

helmet/middlewares/strict-transport-security/index.ts

Lines 31 to 35 in 892ed40

	if ("includeSubdomains" in options) {
	console.warn(
	'Strict-Transport-Security middleware should use `includeSubDomains` instead of `includeSubdomains`. (The correct one has an uppercase "D".)',
	);
	}

To fix this, we should:

1. Update these lines to throw, not warn.
2. Fix the tests.

This change should be opened against the v8.0.0 branch, not main.

[sohrb]

Here is the PR

[EvanHahn]

Done in 2ccdab6. Thanks, @sohrb!