feat: Enable flow, there aren't any file being check yet

.eslintrc

@@ -9,6 +9,7 @@
     "plugin:react/recommended",
     "plugin:flowtype/recommended"
   ],
+  "parser": "babel-eslint",
   "parserOptions": {
     "sourceType": "module",
     "ecmaVersion": 7,

.flowconfig

@@ -0,0 +1,24 @@
+[ignore]
+.*/node_modules/.*
+lib/.*
+.*/test/**/*.json
+.*/static/.*
+.*/test/unit/partials/.*
+.*/test/functional/store/.*
+.*/.nyc_output/.*
+.*/coverage/.*
+.*/.vscode/.*
+
+[include]
+
+[libs]
+node_modules/@verdaccio/types/lib/
+
+[lints]
+
+[options]
+suppress_comment= \\(.\\|\n\\)*\\$FlowFixMe
+unsafe.enable_getters_and_setters=true
+
+[version]
+^0.52.0

package.json

@@ -79,6 +79,7 @@
     "eslint-plugin-react": "7.1.0",
     "extract-text-webpack-plugin": "3.0.0",
     "file-loader": "0.11.2",
+    "flow-bin": "0.52.0",
     "flow-runtime": "0.13.0",
     "friendly-errors-webpack-plugin": "1.6.1",
     "fs-extra": "4.0.1",
@@ -124,6 +125,7 @@
   "scripts": {
     "release": "standard-version -a -s",
     "prepublish": "in-publish && npm run build:webui || not-in-publish",
+    "flow": "flow",
     "test": "mocha ./test/functional ./test/unit --reporter=spec --full-trace",
     "pre:ci": "npm run build:webui",
     "test:ci": "npm run test:coverage",