Bump eslint-plugin-flowtype from 3.9.0 to 3.9.1 (#5611)

Bumps [eslint-plugin-flowtype](https://github.com/gajus/eslint-plugin-flowtype) from 3.9.0 to 3.9.1.
- [Release notes](https://github.com/gajus/eslint-plugin-flowtype/releases)
- [Commits](https://github.com/gajus/eslint-plugin-flowtype/compare/v3.9.0...v3.9.1)

Signed-off-by: dependabot[bot] <support@dependabot.com>

package-lock.json

@@ -3548,9 +3548,9 @@
       }
     },
     "eslint-plugin-flowtype": {
-      "version": "3.9.0",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-flowtype/-/eslint-plugin-flowtype-3.9.0.tgz",
-      "integrity": "sha512-g5CMBJx0dagvOOYLo0ws5Y4+Ma8BBDtgQU+AkjL3W0z8LJUsGL2avY2/bsTZS69qzEA+G7qWKleI1aZp6QNBBw==",
+      "version": "3.9.1",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-flowtype/-/eslint-plugin-flowtype-3.9.1.tgz",
+      "integrity": "sha512-ZlV6SbIXqz2ysvG0F64ZH07dqzLrwMdM1s0UNfoxdXjr4kMKuPPoLViwK+gFC952QIf341AmP4BKtKOhcB96Ug==",
       "dev": true,
       "requires": {
         "lodash": "^4.17.11"

package.json

@@ -56,7 +56,7 @@
     "cross-env": "5.2.0",
     "deep-diff": "1.0.2",
     "eslint": "5.16.0",
-    "eslint-plugin-flowtype": "3.9.0",
+    "eslint-plugin-flowtype": "3.9.1",
     "flow-bin": "0.98.1",
     "gaze": "1.1.3",
     "husky": "2.3.0",