chore(deps): update dependency @types/react-helmet to v6.1.8

Author: renovate[bot]

package.json

@@ -36,7 +36,7 @@
     "@reach/router": "1.3.4",
     "@types/node": "8.10.61",
     "@types/reach__router": "1.3.6",
-    "@types/react-helmet": "6.1.0",
+    "@types/react-helmet": "6.1.8",
     "@types/reactstrap": "8.5.2",
     "gatsby-plugin-graphql-codegen": "2.7.1",
     "prettier": "2.1.2",

yarn.lock

@@ -1669,10 +1669,10 @@
     "@types/history" "*"
     "@types/react" "*"
 
-"@types/react-helmet@6.1.0":
-  version "6.1.0"
-  resolved "https://registry.yarnpkg.com/@types/react-helmet/-/react-helmet-6.1.0.tgz#af586ed685f4905e2adc7462d1d65ace52beee7a"
-  integrity sha512-PYRoU1XJFOzQ3BHvWL1T8iDNbRjdMDJMT5hFmZKGbsq09kbSqJy61uwEpTrbTNWDopVphUT34zUSVLK9pjsgYQ==
+"@types/react-helmet@6.1.8":
+  version "6.1.8"
+  resolved "https://registry.yarnpkg.com/@types/react-helmet/-/react-helmet-6.1.8.tgz#92942afbf620435602de1f500cd9b47d3c09a218"
+  integrity sha512-UyJFvbGWO8xKvfCPFTt/DG/vsgkMqyXbUQAa1pSPco1Whw85Z3ypMEqoHtCDfoW4Qu8XgJp63jyXEhOa4te5Kw==
   dependencies:
     "@types/react" "*"