fix(deps): update gatsby

Author: renovate-bot

package.json

@@ -44,7 +44,7 @@
     "gatsby-plugin-catch-links": "^2.2.0",
     "gatsby-plugin-feed": "^2.4.0",
     "gatsby-plugin-flow": "^1.2.0",
-    "gatsby-plugin-google-gtag": "^1.2.0",
+    "gatsby-plugin-google-gtag": "^2.5.0",
     "gatsby-plugin-manifest": "^2.3.1",
     "gatsby-plugin-offline": "^3.1.0",
     "gatsby-plugin-optimize-svgs": "^1.0.4",
@@ -60,7 +60,7 @@
     "gatsby-remark-images": "^3.2.0",
     "gatsby-remark-katex": "^3.2.0",
     "gatsby-remark-prismjs": "^3.4.0",
-    "gatsby-remark-relative-images": "^0.3.0",
+    "gatsby-remark-relative-images": "^2.0.2",
     "gatsby-remark-responsive-iframe": "^2.3.0",
     "gatsby-remark-smartypants": "^2.2.0",
     "gatsby-source-filesystem": "^2.2.1",