Greenkeeper/eslint plugin flowtype 3.1.4 (#689)

* chore(package): update eslint-plugin-flowtype to version 3.1.4

* chore(package): update lockfile package-lock.json

Author: flovilmart

package-lock.json

@@ -51,7 +51,7 @@
     "browserify": "16.2.3",
     "codecov": "3.1.0",
     "eslint": "^5.3.0",
-    "eslint-plugin-flowtype": "^3.0.0",
+    "eslint-plugin-flowtype": "^3.1.4",
     "express": "^4.16.3",
     "gulp": "4.0.0",
     "gulp-babel": "8.0.0",