Update dependency helmet to v4

Signed-off-by: Renovate Bot <bot@renovateapp.com>

2 files changed, 6 insertions, 95 deletions

diff --git a/package.json b/package.json
index 087abb1c..bb204204 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "gist-embed": "^2.6.0",
     "graceful-fs": "^4.1.11",
     "handlebars": "^4.5.2",
-    "helmet": "^3.21.1",
+    "helmet": "^4.0.0",
     "highlight.js": "^9.12.0",
     "i18n": "^0.13.0",
     "imgur": "git+https://github.com/hackmdio/node-imgur.git",
diff --git a/yarn.lock b/yarn.lock
index 0f22ae5c..547a3ac5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1609,11 +1609,6 @@ bootstrap@^3.4.0:
   resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-3.4.1.tgz#c3a347d419e289ad11f4033e3c4132b87c081d72"
   integrity sha512-yN5oZVmRCwe5aKwzRj6736nSmKDX7pLYwsXiCj/EYmo16hODaBiT4En5btW/jhBF/seV+XMx3aYwukYC3A49DA==
 
-bowser@2.9.0:
-  version "2.9.0"
-  resolved "https://registry.yarnpkg.com/bowser/-/bowser-2.9.0.tgz#3bed854233b419b9a7422d9ee3e85504373821c9"
-  integrity sha512-2ld76tuLBNFekRgmJfT2+3j5MIrP6bFict8WAIT3beq+srz1gcKNAdNKMqHqauQt63NmAa88HfP1/Ypa9Er3HA==
-
 brace-expansion@^1.1.7:
   version "1.1.11"
   resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-1.1.11.tgz#3c7fcbf529d87226f3d2f52b966ff5271eb441dd"
@@ -1935,11 +1930,6 @@ camelcase@^6.0.0, camelcase@^6.2.0:
   resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-6.2.0.tgz#924af881c9d525ac9d87f40d964e5cea982a1809"
   integrity sha512-c7wVvbw3f37nuobQNtgsgG9POC9qMbNuMQmTCqZv23b6MIz0fcYpBiOlv9gEN/hdLdnZTDQhg6e9Dq5M1vKvfg==
 
-camelize@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/camelize/-/camelize-1.0.0.tgz#164a5483e630fa4321e5af07020e531831b2609b"
-  integrity sha1-FkpUg+Yw+kMh5a8HAg5TGDGyYJs=
-
 caniuse-api@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/caniuse-api/-/caniuse-api-3.0.0.tgz#5e4d90e2274961d46291997df599e3ed008ee4c0"
@@ -2479,11 +2469,6 @@ content-disposition@0.5.3:
   dependencies:
     safe-buffer "5.1.2"
 
-content-security-policy-builder@2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/content-security-policy-builder/-/content-security-policy-builder-2.1.0.tgz#0a2364d769a3d7014eec79ff7699804deb8cfcbb"
-  integrity sha512-/MtLWhJVvJNkA9dVLAp6fg9LxD2gfI6R2Fi1hPmfjYXSahJJzcfvoeDOxSyp4NvxMuwWv3WMssE9o31DoULHrQ==
-
 content-type@~1.0.4:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.4.tgz#e138cc75e040c727b1966fe5e5f8c9aee256fe3b"
@@ -3151,11 +3136,6 @@ dashdash@^1.12.0:
   dependencies:
     assert-plus "^1.0.0"
 
-dasherize@2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/dasherize/-/dasherize-2.0.0.tgz#6d809c9cd0cf7bb8952d80fc84fa13d47ddb1308"
-  integrity sha1-bYCcnNDPe7iVLYD8hPoT1H3bEwg=
-
 data-urls@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/data-urls/-/data-urls-1.1.0.tgz#15ee0582baa5e22bb59c77140da8f9c76963bbfe"
@@ -3305,7 +3285,7 @@ denque@^1.4.1:
   resolved "https://registry.yarnpkg.com/denque/-/denque-1.5.0.tgz#773de0686ff2d8ec2ff92914316a47b73b1c73de"
   integrity sha512-CYiCSgIF1p6EUByQPlGkKnP1M9g0ZV3qMIrqMqZqdwazygIA/YP2vrbcyl1h/WppKJTdl1F85cXIle+394iDAQ==
 
-depd@2.0.0, depd@^2.0.0, depd@~2.0.0:
+depd@^2.0.0, depd@~2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/depd/-/depd-2.0.0.tgz#b696163cc757560d09cf22cc8fad1571b79e76df"
   integrity sha512-g7nH6P6dyDioJogAAGprGpCtVImJhpPk/roCzdb3fIh61/s/nPsfR6onyMwkCAR/OlC3yBC0lESvUoQEAssIrw==
@@ -3448,11 +3428,6 @@ domutils@^1.5.1, domutils@^1.7.0:
     dom-serializer "0"
     domelementtype "1"
 
-dont-sniff-mimetype@1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/dont-sniff-mimetype/-/dont-sniff-mimetype-1.1.0.tgz#c7d0427f8bcb095762751252af59d148b0a623b2"
-  integrity sha512-ZjI4zqTaxveH2/tTlzS1wFp+7ncxNZaIEWYg3lzZRHkKf5zPT/MnEG6WL0BhHMJUabkh8GeU5NL5j+rEUCb7Ug==
-
 dot-case@^3.0.4:
   version "3.0.4"
   resolved "https://registry.yarnpkg.com/dot-case/-/dot-case-3.0.4.tgz#9b2b670d00a431667a8a75ba29cd1b98809ce751"
@@ -4250,11 +4225,6 @@ fault@^1.0.0, fault@^1.0.2:
   dependencies:
     format "^0.2.0"
 
-feature-policy@0.3.0:
-  version "0.3.0"
-  resolved "https://registry.yarnpkg.com/feature-policy/-/feature-policy-0.3.0.tgz#7430e8e54a40da01156ca30aaec1a381ce536069"
-  integrity sha512-ZtijOTFN7TzCujt1fnNhfWPFPSHeZkesff9AXZj+UEjYBynWNUIYpC87Ve4wHzyexQsImicLu7WsC2LHq7/xrQ==
-
 fecha@^4.2.0:
   version "4.2.0"
   resolved "https://registry.yarnpkg.com/fecha/-/fecha-4.2.0.tgz#3ffb6395453e3f3efff850404f0a59b6747f5f41"
@@ -4924,48 +4894,16 @@ he@1.2.0, he@^1.1.1, he@^1.2.0:
   resolved "https://registry.yarnpkg.com/he/-/he-1.2.0.tgz#84ae65fa7eafb165fddb61566ae14baf05664f0f"
   integrity sha512-F/1DnUGPopORZi0ni+CvrCgHQ5FyEAHRLSApuYWMmrbSwoN2Mn/7k+Gl38gJnR7yyDZk6WLXwiGod1JOWNDKGw==
 
-helmet-crossdomain@0.4.0:
-  version "0.4.0"
-  resolved "https://registry.yarnpkg.com/helmet-crossdomain/-/helmet-crossdomain-0.4.0.tgz#5f1fe5a836d0325f1da0a78eaa5fd8429078894e"
-  integrity sha512-AB4DTykRw3HCOxovD1nPR16hllrVImeFp5VBV9/twj66lJ2nU75DP8FPL0/Jp4jj79JhTfG+pFI2MD02kWJ+fA==
-
-helmet-csp@2.10.0:
-  version "2.10.0"
-  resolved "https://registry.yarnpkg.com/helmet-csp/-/helmet-csp-2.10.0.tgz#685dde1747bc16c5e28ad9d91e229a69f0a85e84"
-  integrity sha512-Rz953ZNEFk8sT2XvewXkYN0Ho4GEZdjAZy4stjiEQV3eN7GDxg1QKmYggH7otDyIA7uGA6XnUMVSgeJwbR5X+w==
-  dependencies:
-    bowser "2.9.0"
-    camelize "1.0.0"
-    content-security-policy-builder "2.1.0"
-    dasherize "2.0.0"
-
-helmet@^3.21.1:
-  version "3.23.3"
-  resolved "https://registry.yarnpkg.com/helmet/-/helmet-3.23.3.tgz#5ba30209c5f73ded4ab65746a3a11bedd4579ab7"
-  integrity sha512-U3MeYdzPJQhtvqAVBPntVgAvNSOJyagwZwyKsFdyRa8TV3pOKVFljalPOCxbw5Wwf2kncGhmP0qHjyazIdNdSA==
-  dependencies:
-    depd "2.0.0"
-    dont-sniff-mimetype "1.1.0"
-    feature-policy "0.3.0"
-    helmet-crossdomain "0.4.0"
-    helmet-csp "2.10.0"
-    hide-powered-by "1.1.0"
-    hpkp "2.0.0"
-    hsts "2.2.0"
-    nocache "2.1.0"
-    referrer-policy "1.2.0"
-    x-xss-protection "1.3.0"
+helmet@^4.0.0:
+  version "4.4.1"
+  resolved "https://registry.yarnpkg.com/helmet/-/helmet-4.4.1.tgz#a17e1444d81d7a83ddc6e6f9bc6e2055b994efe7"
+  integrity sha512-G8tp0wUMI7i8wkMk2xLcEvESg5PiCitFMYgGRc/PwULB0RVhTP5GFdxOwvJwp9XVha8CuS8mnhmE8I/8dx/pbw==
 
 hex-color-regex@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/hex-color-regex/-/hex-color-regex-1.1.0.tgz#4c06fccb4602fe2602b3c93df82d7e7dbf1a8a8e"
   integrity sha512-l9sfDFsuqtOqKDsQdqrMRk0U85RZc0RtOR9yPI7mRVOa4FsR/BVnZ0shmQRM96Ji99kYZP/7hn1cedc1+ApsTQ==
 
-hide-powered-by@1.1.0:
-  version "1.1.0"
-  resolved "https://registry.yarnpkg.com/hide-powered-by/-/hide-powered-by-1.1.0.tgz#be3ea9cab4bdb16f8744be873755ca663383fa7a"
-  integrity sha512-Io1zA2yOA1YJslkr+AJlWSf2yWFkKjvkcL9Ni1XSUqnGLr/qRQe2UI3Cn/J9MsJht7yEVCe0SscY1HgVMujbgg==
-
 highlight.js@^9.12.0:
   version "9.18.5"
   resolved "https://registry.yarnpkg.com/highlight.js/-/highlight.js-9.18.5.tgz#d18a359867f378c138d6819edfc2a8acd5f29825"
@@ -4993,11 +4931,6 @@ hosted-git-info@^2.1.4:
   resolved "https://registry.yarnpkg.com/hosted-git-info/-/hosted-git-info-2.8.8.tgz#7539bd4bc1e0e0a895815a2e0262420b12858488"
   integrity sha512-f/wzC2QaWBs7t9IYqB4T3sR1xviIViXJRJTWBlx2Gf3g0Xi5vI7Yy4koXQ1c9OYDGHN9sBy1DQ2AB8fqZBWhUg==
 
-hpkp@2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/hpkp/-/hpkp-2.0.0.tgz#10e142264e76215a5d30c44ec43de64dee6d1672"
-  integrity sha1-EOFCJk52IVpdMMROxD3mTe5tFnI=
-
 hsl-regex@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/hsl-regex/-/hsl-regex-1.0.0.tgz#d49330c789ed819e276a4c0d272dffa30b18fe6e"
@@ -5008,13 +4941,6 @@ hsla-regex@^1.0.0:
   resolved "https://registry.yarnpkg.com/hsla-regex/-/hsla-regex-1.0.0.tgz#c1ce7a3168c8c6614033a4b5f7877f3b225f9c38"
   integrity sha1-wc56MWjIxmFAM6S194d/OyJfnDg=
 
-hsts@2.2.0:
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/hsts/-/hsts-2.2.0.tgz#09119d42f7a8587035d027dda4522366fe75d964"
-  integrity sha512-ToaTnQ2TbJkochoVcdXYm4HOCliNozlviNsg+X2XQLQvZNI/kCHR9rZxVYpJB3UPcHz80PgxRyWQ7PdU1r+VBQ==
-  dependencies:
-    depd "2.0.0"
-
 html-comment-regex@^1.1.0:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/html-comment-regex/-/html-comment-regex-1.1.2.tgz#97d4688aeb5c81886a364faa0cad1dda14d433a7"
@@ -7249,11 +7175,6 @@ no-case@^3.0.4:
     lower-case "^2.0.2"
     tslib "^2.0.3"
 
-nocache@2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/nocache/-/nocache-2.1.0.tgz#120c9ffec43b5729b1d5de88cd71aa75a0ba491f"
-  integrity sha512-0L9FvHG3nfnnmaEQPjT9xhfN4ISk0A8/2j4M37Np4mcDesJjHgEUfgPhdCyZuFI954tjokaIj/A3NdpFNdEh4Q==
-
 node-addon-api@^3.0.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/node-addon-api/-/node-addon-api-3.1.0.tgz#98b21931557466c6729e51cb77cd39c965f42239"
@@ -8901,11 +8822,6 @@ reduce-component@1.0.1:
   resolved "https://registry.yarnpkg.com/reduce-component/-/reduce-component-1.0.1.tgz#e0c93542c574521bea13df0f9488ed82ab77c5da"
   integrity sha1-4Mk1QsV0UhvqE98PlIjtgqt3xdo=
 
-referrer-policy@1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/referrer-policy/-/referrer-policy-1.2.0.tgz#b99cfb8b57090dc454895ef897a4cc35ef67a98e"
-  integrity sha512-LgQJIuS6nAy1Jd88DCQRemyE3mS+ispwlqMk3b0yjZ257fI1v9c+/p6SD5gP5FGyXUIgrNOAfmyioHwZtYv2VA==
-
 regenerate@^1.2.1:
   version "1.4.2"
   resolved "https://registry.yarnpkg.com/regenerate/-/regenerate-1.4.2.tgz#b9346d8827e8f5a32f7ba29637d398b69014848a"
@@ -11743,11 +11659,6 @@ wurl@^2.5.3:
   resolved "https://registry.yarnpkg.com/wurl/-/wurl-2.5.4.tgz#6af35a6c623296c4a0c607c4651d01b8f4e3fdec"
   integrity sha512-Vuo550m5YbqRcM/69zz3jVNsCUvFTWLRYQcYvnqNWQ4d0Bjg7aoaofbcsPTe4rM9A2/4xjd8uIf9viIUV9EMXQ==
 
-x-xss-protection@1.3.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/x-xss-protection/-/x-xss-protection-1.3.0.tgz#3e3a8dd638da80421b0e9fff11a2dbe168f6d52c"
-  integrity sha512-kpyBI9TlVipZO4diReZMAHWtS0MMa/7Kgx8hwG/EuZLiA6sg4Ah/4TRdASHhRRN3boobzcYgFRUFSgHRge6Qhg==
-
 xml-crypto@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/xml-crypto/-/xml-crypto-2.0.0.tgz#54cd268ad9d31930afcf7092cbb664258ca9e826"