chore(deps) update eslint-config-jitsi

Flow rules are now separate from the default ones.

package-lock.json

       }
     },
     "eslint-config-jitsi": {
-      "version": "github:jitsi/eslint-config-jitsi#f292fbc07689eb3dbeb81c074accff25b448b074",
-      "from": "github:jitsi/eslint-config-jitsi#1.0.3",
+      "version": "github:jitsi/eslint-config-jitsi#a3af0bf9a3f60d9ff8ad415279223e8a4b0a095e",
+      "from": "github:jitsi/eslint-config-jitsi#2.0.0",
       "dev": true
     },
     "eslint-import-resolver-node": {

package.json

     "clean-css-cli": "4.3.0",
     "css-loader": "3.6.0",
     "eslint": "5.6.1",
-    "eslint-config-jitsi": "github:jitsi/eslint-config-jitsi#1.0.3",
+    "eslint-config-jitsi": "github:jitsi/eslint-config-jitsi#2.0.0",
     "eslint-plugin-flowtype": "2.50.3",
     "eslint-plugin-import": "2.20.2",
     "eslint-plugin-jsdoc": "3.8.0",

react/.eslintrc.js

 module.exports = {
     'extends': [
         '../.eslintrc.js',
+        'eslint-config-jitsi/flow',
         'eslint-config-jitsi/jsdoc',
         'eslint-config-jitsi/react',
         '.eslintrc-react-native.js'