Add retry to axios when the api did not respond (ENOTFOUND, ETIMEDOUT, etc) to prevent network glitches about messaging-apis

[chentsulin]

Feel free to add your interceptors to the underlying axios instance: client.axios.

For example:

const client = new MessengerClient({
  accessToken: ACCESS_TOKEN,
  appId: APP_ID,
  appSecret: APP_SECRET,
  version: '6.0',
});

client.axios.defaults.raxConfig = {
  instance: client.axios
};
const interceptorId = rax.attach(client.axios);

[leopucci]

Nice! I din´t get it how could I attach it. I just did it. 👍
Thanks @chentsulin 🥇
I will let the issue open to you guys discuss if this is a good fit to add globally to the code or just to let user attach by himself.