fix(deps): update dependency gatsby-plugin-offline to v3

Author: renovate-bot

package-lock.json

@@ -14,7 +14,7 @@
     "gatsby-plugin-lodash": "^3.1.10",
     "gatsby-plugin-manifest": "^2.2.20",
     "gatsby-plugin-netlify": "^2.1.17",
-    "gatsby-plugin-offline": "^2.2.10",
+    "gatsby-plugin-offline": "^3.0.11",
     "gatsby-plugin-react-helmet": "^3.1.10",
     "gatsby-plugin-sharp": "^2.2.27",
     "gatsby-plugin-sitemap": "^2.2.16",