Missing directives in ContentSecurityPolicy (Level 3)

[MadCat34]

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Current Zend\Http\Header\ContentSecurityPolicy is too old (CSP 1.0 Header) and should be updated to follow CSP Level 3 (according to https://www.w3.org/TR/CSP/)

So, Some directives are missing in Fetch directive

• child-src
• manifest-src
• worker-src
• prefetch-src
• script-src-elem
• script-src-attr
• style-src-elem
• style-src-attr

And some Navigation, Document and Reporting directives are missing.

• base-uri
• plugin-types
• form-action
• frame-ancestors
• navigate-to
• report-to

Code to reproduce the issue

$csp = new ContentSecurityPolicy();
$csp->setDirective('worker-src', ['https://*.google.com', 'http://foo.com']);
$csp->toString();

Expected results

toString() should return "Content-Security-Policy: worker-src https://*.google.com http://foo.com;"

Actual results

Throw a Exception\InvalidArgumentException

[MadCat34]

I'm working on a PR.