build(deps-dev): bump eslint-plugin-flowtype in /token/js

Bumps [eslint-plugin-flowtype](https://github.com/gajus/eslint-plugin-flowtype) from 5.3.1 to 5.4.0.
- [Release notes](https://github.com/gajus/eslint-plugin-flowtype/releases)
- [Commits](https://github.com/gajus/eslint-plugin-flowtype/compare/v5.3.1...v5.4.0)

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

token/js/package-lock.json

@@ -5595,9 +5595,9 @@
       }
     },
     "eslint-plugin-flowtype": {
-      "version": "5.3.1",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-flowtype/-/eslint-plugin-flowtype-5.3.1.tgz",
-      "integrity": "sha512-mziJD+zw+VTwLtF9qLIxYac0GJCbSEDyqMLP5ENzQeNY5EOxbAfitMFLo+UItjYOISQdh1BCobwE2d4i1o+9Rw==",
+      "version": "5.4.0",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-flowtype/-/eslint-plugin-flowtype-5.4.0.tgz",
+      "integrity": "sha512-O0s0iTT5UxYuoOpHMLSIO2qZMyvrb9shhk1EM5INNGtJ2CffrfUmsnh6TVsnoT41fkXIEndP630WNovhoO87xQ==",
       "dev": true,
       "requires": {
         "lodash": "^4.17.15",