fix(timeout): Don't timeout in requests to metrics endpoint

[tfadeyi]

From #110, a large amount of logs would cause the exporter to error and not return any results.
This solution is mostly a fix rather than a full solution. I'll create ab issue to tackle this, maybe having a flag --auth0.to or --auth0.pages would mitigate the issue of large logs events.

📋 Changes

• Stops the exporter from timing out if requests to the endpoint takes longer than expected.
• Updates the documentations
• Stop exporter from erroring if the context is canceled.

📚 References

• error fetching the log events from Auth0 #110