Update eslint-config-babel to the latest version 🚀 (#299)

* chore(package): update eslint-config-babel to version 6.0.0

https://greenkeeper.io/

* Fix linting

bin/generate-identifier-regex.js

@@ -50,7 +50,7 @@ function generate(chars) {
       at = to;
     }
   }
-  return {nonASCII: re, astral: astral};
+  return { nonASCII: re, astral: astral };
 }
 
 const startData = generate(start);