gatsby 2 -> 3

Author: cprayer

package.json

@@ -29,7 +29,7 @@
     "babel-eslint": "^10.0.1",
     "change-case": "^3.1.0",
     "codeclimate-test-reporter": "^0.5.1",
-    "gatsby": "^2.18.4",
+    "gatsby": "^3",
     "gatsby-link": "^2.1.1",
     "gatsby-plugin-gtag": "^1.0.13",
     "gatsby-plugin-manifest": "^2.2.30",