Explicitly set parser for jsx in ESLint config

Summary:
Followup to D41654962 (59ee573), it looks like the default parser here is something different, so not all newer JS syntax is correctly recognixed. Set the parser for JSX to babel/eslint-parser explicitly.

Changelog:
[General][Fixed] - Explicitly set parser for jsx in ESLint config

Reviewed By: motiz88

Differential Revision: D41708672

fbshipit-source-id: 362716ab0aadb7c9cf5fc9f1175b69168372df88

packages/eslint-config-react-native-community/index.js

@@ -51,6 +51,7 @@ module.exports = {
     },
     {
       files: ['*.jsx'],
+      parser: '@babel/eslint-parser',
     },
     {
       files: ['*.ts', '*.tsx'],