chore(package): update eslint-plugin-flowtype to version 3.2.0

Closes #24

Author: greenkeeper[bot]

package.json

@@ -46,7 +46,7 @@
     "eslint": "^5.0.0",
     "eslint-config-airbnb-base": "^12.1.0",
     "eslint-config-prettier": "^2.6.0",
-    "eslint-plugin-flowtype": "^2.42.0",
+    "eslint-plugin-flowtype": "^3.2.0",
     "eslint-plugin-import": "^2.8.0",
     "eslint-plugin-prettier": "^2.6.0",
     "fetch-mock": "^6.0.0",