Bump helmet from 3.10.0 to 3.12.0

Bumps [helmet](https://github.com/helmetjs/helmet) from 3.10.0 to 3.12.0.
- [Release notes](https://github.com/helmetjs/helmet/releases)
- [Changelog](https://github.com/helmetjs/helmet/blob/master/HISTORY.md)
- [Commits](helmetjs/helmet@v3.10.0...v3.12.0)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot-support

package-lock.json

@@ -85,7 +85,7 @@
     "fs-extra": "~4.0.2",
     "handlebars": "~4.0.11",
     "handlebars-layouts": "~3.1.4",
-    "helmet": "~3.10.0",
+    "helmet": "~3.12.0",
     "html-excerpt": "~0.1.0",
     "mime": "^2.2.0",
     "mongoose": "~4.13.2",

package.json

@@ -2379,9 +2379,9 @@ [email protected]:
     lodash.reduce "4.6.0"
     platform "1.3.5"
 
-helmet@~3.10.0:
-  version "3.10.0"
-  resolved "https://registry.yarnpkg.com/helmet/-/helmet-3.10.0.tgz#96a2a9fec53c26009d3d6265c6cfdada38ddfa7f"
+helmet@~3.12.0:
+  version "3.12.0"
+  resolved "https://registry.yarnpkg.com/helmet/-/helmet-3.12.0.tgz#2098e35cf4e51c64c2f1d38670b7d382a377d92c"
   dependencies:
     dns-prefetch-control "0.1.0"
     dont-sniff-mimetype "1.0.0"
@@ -2394,7 +2394,7 @@ helmet@~3.10.0:
     ienoopen "1.0.0"
     nocache "2.0.0"
     referrer-policy "1.1.0"
-    x-xss-protection "1.0.0"
+    x-xss-protection "1.1.0"
 
 [email protected]:
   version "1.0.0"
@@ -5321,9 +5321,9 @@ ws@~3.3.1:
     safe-buffer "~5.1.0"
     ultron "~1.1.0"
 
-x-xss-protection@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/x-xss-protection/-/x-xss-protection-1.0.0.tgz#898afb93869b24661cf9c52f9ee8db8ed0764dd9"
+x-xss-protection@1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/x-xss-protection/-/x-xss-protection-1.1.0.tgz#4f1898c332deb1e7f2be1280efb3e2c53d69c1a7"
 
 xdg-basedir@^3.0.0:
   version "3.0.0"