Update gatsby monorepo

Author: renovate-bot

package.json

@@ -35,19 +35,19 @@
     "clay-component": "2.14.2",
     "clay-css": "2.14.2",
     "clay-tooltip": "2.15.1",
-    "gatsby": "2.0.104",
+    "gatsby": "3.5.0",
     "gatsby-mdx": "0.1.4",
-    "gatsby-plugin-google-analytics": "2.0.12",
-    "gatsby-plugin-manifest": "2.0.15",
-    "gatsby-plugin-offline": "2.0.22",
-    "gatsby-plugin-react-helmet": "3.0.5",
-    "gatsby-plugin-sass": "2.0.8",
+    "gatsby-plugin-google-analytics": "3.5.0",
+    "gatsby-plugin-manifest": "3.5.0",
+    "gatsby-plugin-offline": "4.5.0",
+    "gatsby-plugin-react-helmet": "4.5.0",
+    "gatsby-plugin-sass": "4.5.0",
     "gatsby-plugin-zopfli": "1.0.4",
     "gatsby-remark-component": "1.1.3",
-    "gatsby-remark-copy-linked-files": "2.0.8",
-    "gatsby-remark-prismjs": "3.2.3",
-    "gatsby-source-filesystem": "2.0.18",
-    "gatsby-transformer-remark": "2.2.2",
+    "gatsby-remark-copy-linked-files": "4.2.0",
+    "gatsby-remark-prismjs": "5.2.0",
+    "gatsby-source-filesystem": "3.5.0",
+    "gatsby-transformer-remark": "4.2.0",
     "metal-clipboard": "2.0.1",
     "metal-tabs": "2.3.1",
     "netlify-identity-widget": "1.5.4",