chore(package): update eslint-plugin-flowtype to version 4.3.0

Closes #33

Author: greenkeeper[bot]

package.json

@@ -38,7 +38,7 @@
     "enzyme-adapter-react-16": "^1.6.0",
     "eslint": "6.0.1",
     "eslint-loader": "2.2.0",
-    "eslint-plugin-flowtype": "3.11.1",
+    "eslint-plugin-flowtype": "4.3.0",
     "eslint-plugin-react": "^7.0.0",
     "file-loader": "4.0.0",
     "flow-bin": "0.102.0",