Update dependency @types/react to v16.8.16

Author: renovate-bot

packages/iotex-react-block-producers/package.json

@@ -73,7 +73,7 @@
     "@types/graphql": "14.2.0",
     "@types/node": "11.13.8",
     "@types/node-fetch": "2.3.3",
-    "@types/react": "16.8.15",
+    "@types/react": "16.8.16",
     "@types/react-test-renderer": "16.8.1",
     "antd": "3.16.6",
     "apollo-cache-inmemory": "1.5.1",

packages/iotex-react-language-dropdown/package.json

@@ -71,7 +71,7 @@
     "@babel/preset-typescript": "7.3.3",
     "@babel/register": "7.4.4",
     "@types/node": "11.13.8",
-    "@types/react": "16.8.15",
+    "@types/react": "16.8.16",
     "@types/react-redux": "7.0.8",
     "@types/react-test-renderer": "16.8.1",
     "ava": "1.4.1",