Update gatsby monorepo

Author: renovate-bot

package.json

@@ -17,12 +17,12 @@
   },
   "dependencies": {
     "@lekoarts/gatsby-theme-cara": "1.2.20",
-    "gatsby": "2.32.4",
-    "gatsby-plugin-gatsby-cloud": "1.0.1",
-    "gatsby-plugin-google-analytics": "2.11.0",
-    "gatsby-plugin-manifest": "2.12.0",
-    "gatsby-plugin-netlify": "2.11.0",
-    "gatsby-plugin-offline": "3.10.1",
+    "gatsby": "3.4.2",
+    "gatsby-plugin-gatsby-cloud": "2.4.1",
+    "gatsby-plugin-google-analytics": "3.4.0",
+    "gatsby-plugin-manifest": "3.4.0",
+    "gatsby-plugin-netlify": "3.4.0",
+    "gatsby-plugin-offline": "4.4.0",
     "gatsby-plugin-webpack-bundle-analyser-v2": "1.1.20",
     "react": "16.14.0",
     "react-dom": "16.14.0"