bump yarn lock after gatsby version updates

platform/ui/package.json

@@ -29,11 +29,11 @@
   "dependencies": {
     "classnames": "^2.2.6",
     "docz": "^2.2.0",
-    "gatsby": "2.19.24",
-    "gatsby-plugin-postcss": "^2.1.20",
-    "gatsby-plugin-react-svg": "^3.0.0",
-    "gatsby-plugin-sass": "^2.1.28",
-    "gatsby-theme-docz": "^2.2.0",
+    "gatsby": "2.22.19",
+    "gatsby-plugin-postcss": "2.3.3",
+    "gatsby-plugin-react-svg": "3.0.0",
+    "gatsby-plugin-sass": "2.3.3",
+    "gatsby-theme-docz": "2.3.1",
     "moment": "^2.24.0",
     "node-sass": "^4.13.1",
     "prop-types": "^15.7.2",