chore: Upgrade flow (#1854)

* wip: upgrade flow

* chore: More sealed props improvements

* Final fixes

package.json

@@ -12,7 +12,6 @@
     "start": "node ./build/server/index.js",
     "dev": "nodemon --exec \"yarn build:server && yarn build:i18n && node build/server/index.js\" -e js --ignore build/ --ignore app/",
     "lint": "eslint app server shared",
-    "flow": "flow",
     "deploy": "git push heroku master",
     "heroku-postbuild": "yarn build && yarn sequelize:migrate",
     "sequelize:create-migration": "sequelize migration:create",
@@ -192,7 +191,7 @@
     "eslint-plugin-react": "^7.20.0",
     "eslint-plugin-react-hooks": "^4.1.0",
     "fetch-test-server": "^1.1.0",
-    "flow-bin": "^0.104.0",
+    "flow-bin": "^0.124.0",
     "html-webpack-plugin": "3.2.0",
     "i18next-parser": "^3.3.0",
     "jest-cli": "^26.0.0",