Update dependency helmet to v4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
helmet (source)	^3.15.0 -> ^4.0.0

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Release Notes

helmetjs/helmet

v4.4.1

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Changed

• Shrink the published package by about 2.5 kB

v4.4.0

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Added

• helmet.originAgentCluster: a new middleware for the Origin-Agent-Cluster middleware, disabled by default

v4.3.1

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Fixed

• helmet.contentSecurityPolicy: broken TypeScript types. See #​283

v4.3.0

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Added

• helmet.contentSecurityPolicy: setting the default-src to helmet.contentSecurityPolicy.dangerouslyDisableDefaultSrc disables it

Changed

• helmet.frameguard: slightly improved error messages for non-strings

v4.2.0

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Added

• helmet.contentSecurityPolicy: get the default directives with contentSecurityPolicy.getDefaultDirectives()

Changed

• helmet() now supports objects that don't have Object.prototype in their chain, such as Object.create(null), as options
• helmet.expectCt: max-age is now first. See #​264

v4.1.1

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Changed

• Fixed a few errors in the README

v4.1.0

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Added

• helmet.contentSecurityPolicy:
  • Directive values can now include functions, as they could in Helmet 3. See #​243

Changed

• Helmet should now play more nicely with TypeScript

Removed

• The HelmetOptions interface is no longer exported. This only affects TypeScript users. If you need the functionality back, see this comment

v4.0.0

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See the Helmet 4 upgrade guide for help upgrading from Helmet 3.

Added

• helmet.contentSecurityPolicy:
  • If no default-src directive is supplied, an error is thrown
  • Directive lists can be any iterable, not just arrays

Changed

• This package no longer has dependencies. This should have no effect on end users, other than speeding up installation time.
• helmet.contentSecurityPolicy:
  • There is now a default set of directives if none are supplied
  • Duplicate keys now throw an error. See helmetjs/csp#​73
  • This middleware is more lenient, allowing more directive names or values
• helmet.xssFilter now disables the buggy XSS filter by default. See #​230

Removed

• Dropped support for old Node versions. Node 10+ is now required
• helmet.featurePolicy. If you still need it, use the feature-policy package on npm.
• helmet.hpkp. If you still need it, use the hpkp package on npm.
• helmet.noCache. If you still need it, use the nocache package on npm.
• helmet.contentSecurityPolicy:
  • Removed browser sniffing (including the browserSniff and disableAndroid parameters). See helmetjs/csp#​97
  • Removed conditional support. This includes directive functions and support for a function as the reportOnly. Read this if you need help.
  • Removed a lot of checks—you should be checking your CSP with a different tool
  • Removed support for legacy headers (and therefore the setAllHeaders parameter). Read this if you need help.
  • Removed the loose option
  • Removed support for functions as directive values. You must supply an iterable of strings
• helmet.frameguard:
  • Dropped support for the ALLOW-FROM action. Read more here.
• helmet.hidePoweredBy no longer accepts arguments. See this article to see how to replicate the removed behavior. See #​224.
• helmet.hsts:
  • Dropped support for includeSubdomains with a lowercase D. See #​231
  • Dropped support for setIf. Read this if you need help.. See #​232
• helmet.xssFilter no longer accepts options. Read "How to disable blocking with X–XSS–Protection" and "How to enable the report directive with X–XSS–Protection" if you need the legacy behavior.

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