chore(deps-dev): bump @types/react-helmet from 5.0.15 to 6.1.0

Bumps [@types/react-helmet](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react-helmet) from 5.0.15 to 6.1.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react-helmet)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

packages/core/package.json

@@ -63,7 +63,7 @@
     "@types/google-protobuf": "^3.7.2",
     "@types/jest": "^26.0.7",
     "@types/node": "^12.0.0",
-    "@types/react-helmet": "^5.0.15",
+    "@types/react-helmet": "^6.1.0",
     "@types/zen-observable": "^0.8.0",
     "jest-fetch-mock": "^3.0.3"
   },

yarn.lock

@@ -4531,10 +4531,10 @@
   dependencies:
     "@types/react" "*"
 
-"@types/react-helmet@^5.0.15":
-  version "5.0.15"
-  resolved "https://registry.npmjs.org/@types/react-helmet/-/react-helmet-5.0.15.tgz#af0370617307e9f062c6aee0f1f5588224ce646e"
-  integrity sha512-CCjqvecDJTXRrHG8aTc2YECcQCl26za/q+NaBRvy/wtm0Uh38koM2dpv2bG1xJV4ckz3t1lm2/5KU6nt2s9BWg==
+"@types/react-helmet@^6.1.0":
+  version "6.1.0"
+  resolved "https://registry.npmjs.org/@types/react-helmet/-/react-helmet-6.1.0.tgz#af586ed685f4905e2adc7462d1d65ace52beee7a"
+  integrity sha512-PYRoU1XJFOzQ3BHvWL1T8iDNbRjdMDJMT5hFmZKGbsq09kbSqJy61uwEpTrbTNWDopVphUT34zUSVLK9pjsgYQ==
   dependencies:
     "@types/react" "*"