Bump default timeout from 3 to 60 seconds.

[ojongerius]

We have 1000+ monitors in our setup, and often hit the 3 default timeout of 3 seconds when poking around using datadog/api.

This bumps the default setting to 60 seconds, which allows us to retrieve our monitors. I do realise bumping the default value is not the most subtle approach, but as 3 seconds is pretty short -much shorter than any CLI http client I've seen, and considering the REST response times for larger customers are often over 3 seconds this could be good enough.

[yannmh]

We've been thinking about doing it for a while: let's 🚢 it.

Thanks @ojongerius 🙇

[forkloop]

When can you release this change? We are also starting to see more timeout recently.