Updated react@18 for gatsby helper package

Author: aileen

packages/helpers-gatsby/package.json

@@ -30,18 +30,18 @@
     "@babel/preset-react": "7.17.12",
     "c8": "7.11.3",
     "mocha": "10.0.0",
-    "react": "16.14.0",
+    "react": "18.1.0",
     "rimraf": "3.0.2",
     "should": "13.2.3",
     "sinon": "14.0.0"
   },
   "dependencies": {
-    "@reach/router": "^1.2.1",
+    "@gatsbyjs/reach-router": "1.3.7",
     "@tryghost/helpers": "^1.1.70",
-    "gatsby-link": "^2.9.0",
+    "gatsby-link": "4.15.0",
     "prop-types": "^15.6.2"
   },
   "peerDependencies": {
-    "react": "^16.9.0"
+    "react": "^18.1.0"
   }
 }