fix(deps): update react monorepo to v16.6.3

Author: renovate-bot

src/templates/React InstantSearch Native/package.json

@@ -14,7 +14,7 @@
     "algoliasearch": "3.30.0",
     "expo": "30.0.1",
     "prop-types": "15.6.2",
-    "react": "16.5.2",
+    "react": "16.6.3",
     "react-instantsearch-native": "{{libraryVersion}}",
     "react-native": "0.55.4"
   },

src/templates/React InstantSearch/package.json

@@ -10,8 +10,8 @@
   },
   "dependencies": {
     "algoliasearch": "3.30.0",
-    "react": "16.6.0",
-    "react-dom": "16.6.0",
+    "react": "16.6.3",
+    "react-dom": "16.6.3",
     "react-instantsearch-dom": "{{libraryVersion}}",
     "react-scripts": "2.1.1"
   },