Add timeout configuration for requests

[colvardrm2]

Support plan

• is this issue currently blocking your project? (yes/no): no
• is this issue affecting a production system? (yes/no): yes

Context

• node version: 12
• module version: 12.2.0
• environment (e.g. node, browser, native): node
• used with (e.g. hapi application, another framework, standalone, ...): hapi application
• any other relevant information:

What problem are you trying to solve?

We saw an issue recently where our authentication requests (specifically the token call) timed out after 2 minutes, which ended up increasing our response times dramatically. It woul be nice to be able to configure a timeout ourselves to allow requests to fail faster, since we don't expect them to take anywhere near that long.

Do you have a new or modified API suggestion to solve the problem?

Add a timeout option to the provider options