fix(starters): update react monorepo to ^16.8.3 (#11978)

Author: renovate[bot]

starters/blog/package-lock.json

@@ -26,8 +26,8 @@
     "gatsby-transformer-remark": "^2.2.5",
     "gatsby-transformer-sharp": "^2.1.14",
     "prismjs": "^1.15.0",
-    "react": "^16.8.2",
-    "react-dom": "^16.8.2",
+    "react": "^16.8.3",
+    "react-dom": "^16.8.3",
     "react-helmet": "^5.2.0",
     "react-typography": "^0.16.18",
     "typeface-merriweather": "0.0.54",

starters/blog/package.json

@@ -14,8 +14,8 @@
     "gatsby-source-filesystem": "^2.0.21",
     "gatsby-transformer-sharp": "^2.1.14",
     "prop-types": "^15.7.2",
-    "react": "^16.8.2",
-    "react-dom": "^16.8.2",
+    "react": "^16.8.3",
+    "react-dom": "^16.8.3",
     "react-helmet": "^5.2.0"
   },
   "keywords": [

starters/default/package-lock.json

@@ -13,8 +13,8 @@
   },
   "dependencies": {
     "gatsby": "^2.1.11",
-    "react": "^16.8.2",
-    "react-dom": "^16.8.2"
+    "react": "^16.8.3",
+    "react-dom": "^16.8.3"
   },
   "repository": {
     "type": "git",